1 /*
2 * Wi-Fi Protected Setup - Registrar
3 * Copyright (c) 2008-2016, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "utils/includes.h"
10
11 #include "utils/common.h"
12 #include "utils/base64.h"
13 #include "utils/eloop.h"
14 #include "utils/uuid.h"
15 #include "utils/list.h"
16 #include "crypto/crypto.h"
17 #include "crypto/sha256.h"
18 #include "crypto/random.h"
19 #include "common/ieee802_11_defs.h"
20 #include "wps_i.h"
21 #include "wps_dev_attr.h"
22 #include "wps_upnp.h"
23 #include "wps_upnp_i.h"
24
25 #ifndef CONFIG_WPS_STRICT
26 #define WPS_WORKAROUNDS
27 #endif /* CONFIG_WPS_STRICT */
28
29 #ifdef CONFIG_WPS_NFC
30
31 struct wps_nfc_pw_token {
32 struct dl_list list;
33 u8 pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN];
34 unsigned int peer_pk_hash_known:1;
35 u16 pw_id;
36 u8 dev_pw[WPS_OOB_DEVICE_PASSWORD_LEN * 2 + 1];
37 size_t dev_pw_len;
38 int pk_hash_provided_oob; /* whether own PK hash was provided OOB */
39 };
40
41
wps_remove_nfc_pw_token(struct wps_nfc_pw_token * token)42 static void wps_remove_nfc_pw_token(struct wps_nfc_pw_token *token)
43 {
44 dl_list_del(&token->list);
45 bin_clear_free(token, sizeof(*token));
46 }
47
48
wps_free_nfc_pw_tokens(struct dl_list * tokens,u16 pw_id)49 static void wps_free_nfc_pw_tokens(struct dl_list *tokens, u16 pw_id)
50 {
51 struct wps_nfc_pw_token *token, *prev;
52 dl_list_for_each_safe(token, prev, tokens, struct wps_nfc_pw_token,
53 list) {
54 if (pw_id == 0 || pw_id == token->pw_id)
55 wps_remove_nfc_pw_token(token);
56 }
57 }
58
59
wps_get_nfc_pw_token(struct dl_list * tokens,u16 pw_id)60 static struct wps_nfc_pw_token * wps_get_nfc_pw_token(struct dl_list *tokens,
61 u16 pw_id)
62 {
63 struct wps_nfc_pw_token *token;
64 dl_list_for_each(token, tokens, struct wps_nfc_pw_token, list) {
65 if (pw_id == token->pw_id)
66 return token;
67 }
68 return NULL;
69 }
70
71 #else /* CONFIG_WPS_NFC */
72
73 #define wps_free_nfc_pw_tokens(t, p) do { } while (0)
74
75 #endif /* CONFIG_WPS_NFC */
76
77
78 struct wps_uuid_pin {
79 struct dl_list list;
80 u8 uuid[WPS_UUID_LEN];
81 int wildcard_uuid;
82 u8 *pin;
83 size_t pin_len;
84 #define PIN_LOCKED BIT(0)
85 #define PIN_EXPIRES BIT(1)
86 int flags;
87 struct os_reltime expiration;
88 u8 enrollee_addr[ETH_ALEN];
89 };
90
91
wps_free_pin(struct wps_uuid_pin * pin)92 static void wps_free_pin(struct wps_uuid_pin *pin)
93 {
94 bin_clear_free(pin->pin, pin->pin_len);
95 os_free(pin);
96 }
97
98
wps_remove_pin(struct wps_uuid_pin * pin)99 static void wps_remove_pin(struct wps_uuid_pin *pin)
100 {
101 dl_list_del(&pin->list);
102 wps_free_pin(pin);
103 }
104
105
wps_free_pins(struct dl_list * pins)106 static void wps_free_pins(struct dl_list *pins)
107 {
108 struct wps_uuid_pin *pin, *prev;
109 dl_list_for_each_safe(pin, prev, pins, struct wps_uuid_pin, list)
110 wps_remove_pin(pin);
111 }
112
113
114 struct wps_pbc_session {
115 struct wps_pbc_session *next;
116 u8 addr[ETH_ALEN];
117 u8 uuid_e[WPS_UUID_LEN];
118 struct os_reltime timestamp;
119 };
120
121
wps_free_pbc_sessions(struct wps_pbc_session * pbc)122 static void wps_free_pbc_sessions(struct wps_pbc_session *pbc)
123 {
124 struct wps_pbc_session *prev;
125
126 while (pbc) {
127 prev = pbc;
128 pbc = pbc->next;
129 os_free(prev);
130 }
131 }
132
133
134 struct wps_registrar_device {
135 struct wps_registrar_device *next;
136 struct wps_device_data dev;
137 u8 uuid[WPS_UUID_LEN];
138 };
139
140
141 struct wps_registrar {
142 struct wps_context *wps;
143
144 int pbc;
145 int selected_registrar;
146
147 int (*new_psk_cb)(void *ctx, const u8 *mac_addr, const u8 *p2p_dev_addr,
148 const u8 *psk, size_t psk_len);
149 int (*set_ie_cb)(void *ctx, struct wpabuf *beacon_ie,
150 struct wpabuf *probe_resp_ie);
151 void (*pin_needed_cb)(void *ctx, const u8 *uuid_e,
152 const struct wps_device_data *dev);
153 void (*reg_success_cb)(void *ctx, const u8 *mac_addr,
154 const u8 *uuid_e, const u8 *dev_pw,
155 size_t dev_pw_len);
156 void (*set_sel_reg_cb)(void *ctx, int sel_reg, u16 dev_passwd_id,
157 u16 sel_reg_config_methods);
158 void (*enrollee_seen_cb)(void *ctx, const u8 *addr, const u8 *uuid_e,
159 const u8 *pri_dev_type, u16 config_methods,
160 u16 dev_password_id, u8 request_type,
161 const char *dev_name);
162 void *cb_ctx;
163
164 struct dl_list pins;
165 struct dl_list nfc_pw_tokens;
166 struct wps_pbc_session *pbc_sessions;
167
168 int skip_cred_build;
169 struct wpabuf *extra_cred;
170 int disable_auto_conf;
171 int sel_reg_union;
172 int sel_reg_dev_password_id_override;
173 int sel_reg_config_methods_override;
174 int static_wep_only;
175 int dualband;
176 int force_per_enrollee_psk;
177
178 struct wps_registrar_device *devices;
179
180 int force_pbc_overlap;
181
182 u8 authorized_macs[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN];
183 u8 authorized_macs_union[WPS_MAX_AUTHORIZED_MACS][ETH_ALEN];
184
185 u8 p2p_dev_addr[ETH_ALEN];
186
187 u8 pbc_ignore_uuid[WPS_UUID_LEN];
188 #ifdef WPS_WORKAROUNDS
189 struct os_reltime pbc_ignore_start;
190 #endif /* WPS_WORKAROUNDS */
191 };
192
193
194 static int wps_set_ie(struct wps_registrar *reg);
195 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx);
196 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
197 void *timeout_ctx);
198 static void wps_registrar_remove_pin(struct wps_registrar *reg,
199 struct wps_uuid_pin *pin);
200
201
wps_registrar_add_authorized_mac(struct wps_registrar * reg,const u8 * addr)202 static void wps_registrar_add_authorized_mac(struct wps_registrar *reg,
203 const u8 *addr)
204 {
205 int i;
206 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC " MACSTR,
207 MAC2STR(addr));
208 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
209 if (os_memcmp(reg->authorized_macs[i], addr, ETH_ALEN) == 0) {
210 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was "
211 "already in the list");
212 return; /* already in list */
213 }
214 for (i = WPS_MAX_AUTHORIZED_MACS - 1; i > 0; i--)
215 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i - 1],
216 ETH_ALEN);
217 os_memcpy(reg->authorized_macs[0], addr, ETH_ALEN);
218 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
219 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
220 }
221
222
wps_registrar_remove_authorized_mac(struct wps_registrar * reg,const u8 * addr)223 static void wps_registrar_remove_authorized_mac(struct wps_registrar *reg,
224 const u8 *addr)
225 {
226 int i;
227 wpa_printf(MSG_DEBUG, "WPS: Remove authorized MAC " MACSTR,
228 MAC2STR(addr));
229 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++) {
230 if (os_memcmp(reg->authorized_macs, addr, ETH_ALEN) == 0)
231 break;
232 }
233 if (i == WPS_MAX_AUTHORIZED_MACS) {
234 wpa_printf(MSG_DEBUG, "WPS: Authorized MAC was not in the "
235 "list");
236 return; /* not in the list */
237 }
238 for (; i + 1 < WPS_MAX_AUTHORIZED_MACS; i++)
239 os_memcpy(reg->authorized_macs[i], reg->authorized_macs[i + 1],
240 ETH_ALEN);
241 os_memset(reg->authorized_macs[WPS_MAX_AUTHORIZED_MACS - 1], 0,
242 ETH_ALEN);
243 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs",
244 (u8 *) reg->authorized_macs, sizeof(reg->authorized_macs));
245 }
246
247
wps_free_devices(struct wps_registrar_device * dev)248 static void wps_free_devices(struct wps_registrar_device *dev)
249 {
250 struct wps_registrar_device *prev;
251
252 while (dev) {
253 prev = dev;
254 dev = dev->next;
255 wps_device_data_free(&prev->dev);
256 os_free(prev);
257 }
258 }
259
260
wps_device_get(struct wps_registrar * reg,const u8 * addr)261 static struct wps_registrar_device * wps_device_get(struct wps_registrar *reg,
262 const u8 *addr)
263 {
264 struct wps_registrar_device *dev;
265
266 for (dev = reg->devices; dev; dev = dev->next) {
267 if (os_memcmp(dev->dev.mac_addr, addr, ETH_ALEN) == 0)
268 return dev;
269 }
270 return NULL;
271 }
272
273
wps_device_clone_data(struct wps_device_data * dst,struct wps_device_data * src)274 static void wps_device_clone_data(struct wps_device_data *dst,
275 struct wps_device_data *src)
276 {
277 os_memcpy(dst->mac_addr, src->mac_addr, ETH_ALEN);
278 os_memcpy(dst->pri_dev_type, src->pri_dev_type, WPS_DEV_TYPE_LEN);
279
280 #define WPS_STRDUP(n) \
281 os_free(dst->n); \
282 dst->n = src->n ? os_strdup(src->n) : NULL
283
284 WPS_STRDUP(device_name);
285 WPS_STRDUP(manufacturer);
286 WPS_STRDUP(model_name);
287 WPS_STRDUP(model_number);
288 WPS_STRDUP(serial_number);
289 #undef WPS_STRDUP
290 }
291
292
wps_device_store(struct wps_registrar * reg,struct wps_device_data * dev,const u8 * uuid)293 int wps_device_store(struct wps_registrar *reg,
294 struct wps_device_data *dev, const u8 *uuid)
295 {
296 struct wps_registrar_device *d;
297
298 d = wps_device_get(reg, dev->mac_addr);
299 if (d == NULL) {
300 d = os_zalloc(sizeof(*d));
301 if (d == NULL)
302 return -1;
303 d->next = reg->devices;
304 reg->devices = d;
305 }
306
307 wps_device_clone_data(&d->dev, dev);
308 os_memcpy(d->uuid, uuid, WPS_UUID_LEN);
309
310 return 0;
311 }
312
313
wps_registrar_add_pbc_session(struct wps_registrar * reg,const u8 * addr,const u8 * uuid_e)314 static void wps_registrar_add_pbc_session(struct wps_registrar *reg,
315 const u8 *addr, const u8 *uuid_e)
316 {
317 struct wps_pbc_session *pbc, *prev = NULL;
318 struct os_reltime now;
319
320 os_get_reltime(&now);
321
322 pbc = reg->pbc_sessions;
323 while (pbc) {
324 if (os_memcmp(pbc->addr, addr, ETH_ALEN) == 0 &&
325 os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0) {
326 if (prev)
327 prev->next = pbc->next;
328 else
329 reg->pbc_sessions = pbc->next;
330 break;
331 }
332 prev = pbc;
333 pbc = pbc->next;
334 }
335
336 if (!pbc) {
337 pbc = os_zalloc(sizeof(*pbc));
338 if (pbc == NULL)
339 return;
340 os_memcpy(pbc->addr, addr, ETH_ALEN);
341 if (uuid_e)
342 os_memcpy(pbc->uuid_e, uuid_e, WPS_UUID_LEN);
343 }
344
345 pbc->next = reg->pbc_sessions;
346 reg->pbc_sessions = pbc;
347 pbc->timestamp = now;
348
349 /* remove entries that have timed out */
350 prev = pbc;
351 pbc = pbc->next;
352
353 while (pbc) {
354 if (os_reltime_expired(&now, &pbc->timestamp,
355 WPS_PBC_WALK_TIME)) {
356 prev->next = NULL;
357 wps_free_pbc_sessions(pbc);
358 break;
359 }
360 prev = pbc;
361 pbc = pbc->next;
362 }
363 }
364
365
wps_registrar_remove_pbc_session(struct wps_registrar * reg,const u8 * uuid_e,const u8 * p2p_dev_addr)366 static void wps_registrar_remove_pbc_session(struct wps_registrar *reg,
367 const u8 *uuid_e,
368 const u8 *p2p_dev_addr)
369 {
370 struct wps_pbc_session *pbc, *prev = NULL, *tmp;
371
372 pbc = reg->pbc_sessions;
373 while (pbc) {
374 if (os_memcmp(pbc->uuid_e, uuid_e, WPS_UUID_LEN) == 0 ||
375 (p2p_dev_addr && !is_zero_ether_addr(reg->p2p_dev_addr) &&
376 os_memcmp(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) ==
377 0)) {
378 if (prev)
379 prev->next = pbc->next;
380 else
381 reg->pbc_sessions = pbc->next;
382 tmp = pbc;
383 pbc = pbc->next;
384 wpa_printf(MSG_DEBUG, "WPS: Removing PBC session for "
385 "addr=" MACSTR, MAC2STR(tmp->addr));
386 wpa_hexdump(MSG_DEBUG, "WPS: Removed UUID-E",
387 tmp->uuid_e, WPS_UUID_LEN);
388 os_free(tmp);
389 continue;
390 }
391 prev = pbc;
392 pbc = pbc->next;
393 }
394 }
395
396
wps_registrar_pbc_overlap(struct wps_registrar * reg,const u8 * addr,const u8 * uuid_e)397 int wps_registrar_pbc_overlap(struct wps_registrar *reg,
398 const u8 *addr, const u8 *uuid_e)
399 {
400 int count = 0;
401 struct wps_pbc_session *pbc;
402 struct wps_pbc_session *first = NULL;
403 struct os_reltime now;
404
405 os_get_reltime(&now);
406
407 wpa_printf(MSG_DEBUG, "WPS: Checking active PBC sessions for overlap");
408
409 if (uuid_e) {
410 wpa_printf(MSG_DEBUG, "WPS: Add one for the requested UUID");
411 wpa_hexdump(MSG_DEBUG, "WPS: Requested UUID",
412 uuid_e, WPS_UUID_LEN);
413 count++;
414 }
415
416 for (pbc = reg->pbc_sessions; pbc; pbc = pbc->next) {
417 wpa_printf(MSG_DEBUG, "WPS: Consider PBC session with " MACSTR,
418 MAC2STR(pbc->addr));
419 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E",
420 pbc->uuid_e, WPS_UUID_LEN);
421 if (os_reltime_expired(&now, &pbc->timestamp,
422 WPS_PBC_WALK_TIME)) {
423 wpa_printf(MSG_DEBUG, "WPS: PBC walk time has expired");
424 break;
425 }
426 if (first &&
427 os_memcmp(pbc->uuid_e, first->uuid_e, WPS_UUID_LEN) == 0) {
428 wpa_printf(MSG_DEBUG, "WPS: Same Enrollee");
429 continue; /* same Enrollee */
430 }
431 if (uuid_e == NULL ||
432 os_memcmp(uuid_e, pbc->uuid_e, WPS_UUID_LEN)) {
433 wpa_printf(MSG_DEBUG, "WPS: New Enrollee");
434 count++;
435 }
436 if (first == NULL)
437 first = pbc;
438 }
439
440 wpa_printf(MSG_DEBUG, "WPS: %u active PBC session(s) found", count);
441
442 return count > 1 ? 1 : 0;
443 }
444
445
wps_build_wps_state(struct wps_context * wps,struct wpabuf * msg)446 static int wps_build_wps_state(struct wps_context *wps, struct wpabuf *msg)
447 {
448 wpa_printf(MSG_DEBUG, "WPS: * Wi-Fi Protected Setup State (%d)",
449 wps->wps_state);
450 wpabuf_put_be16(msg, ATTR_WPS_STATE);
451 wpabuf_put_be16(msg, 1);
452 wpabuf_put_u8(msg, wps->wps_state);
453 return 0;
454 }
455
456
457 #ifdef CONFIG_WPS_UPNP
wps_registrar_free_pending_m2(struct wps_context * wps)458 static void wps_registrar_free_pending_m2(struct wps_context *wps)
459 {
460 struct upnp_pending_message *p, *p2, *prev = NULL;
461 p = wps->upnp_msgs;
462 while (p) {
463 if (p->type == WPS_M2 || p->type == WPS_M2D) {
464 if (prev == NULL)
465 wps->upnp_msgs = p->next;
466 else
467 prev->next = p->next;
468 wpa_printf(MSG_DEBUG, "WPS UPnP: Drop pending M2/M2D");
469 p2 = p;
470 p = p->next;
471 wpabuf_free(p2->msg);
472 os_free(p2);
473 continue;
474 }
475 prev = p;
476 p = p->next;
477 }
478 }
479 #endif /* CONFIG_WPS_UPNP */
480
481
wps_build_ap_setup_locked(struct wps_context * wps,struct wpabuf * msg)482 static int wps_build_ap_setup_locked(struct wps_context *wps,
483 struct wpabuf *msg)
484 {
485 if (wps->ap_setup_locked && wps->ap_setup_locked != 2) {
486 wpa_printf(MSG_DEBUG, "WPS: * AP Setup Locked");
487 wpabuf_put_be16(msg, ATTR_AP_SETUP_LOCKED);
488 wpabuf_put_be16(msg, 1);
489 wpabuf_put_u8(msg, 1);
490 }
491 return 0;
492 }
493
494
wps_build_selected_registrar(struct wps_registrar * reg,struct wpabuf * msg)495 static int wps_build_selected_registrar(struct wps_registrar *reg,
496 struct wpabuf *msg)
497 {
498 if (!reg->sel_reg_union)
499 return 0;
500 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar");
501 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR);
502 wpabuf_put_be16(msg, 1);
503 wpabuf_put_u8(msg, 1);
504 return 0;
505 }
506
507
wps_build_sel_reg_dev_password_id(struct wps_registrar * reg,struct wpabuf * msg)508 static int wps_build_sel_reg_dev_password_id(struct wps_registrar *reg,
509 struct wpabuf *msg)
510 {
511 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
512 if (!reg->sel_reg_union)
513 return 0;
514 if (reg->sel_reg_dev_password_id_override >= 0)
515 id = reg->sel_reg_dev_password_id_override;
516 wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id);
517 wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
518 wpabuf_put_be16(msg, 2);
519 wpabuf_put_be16(msg, id);
520 return 0;
521 }
522
523
wps_build_sel_pbc_reg_uuid_e(struct wps_registrar * reg,struct wpabuf * msg)524 static int wps_build_sel_pbc_reg_uuid_e(struct wps_registrar *reg,
525 struct wpabuf *msg)
526 {
527 u16 id = reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT;
528 if (!reg->sel_reg_union)
529 return 0;
530 if (reg->sel_reg_dev_password_id_override >= 0)
531 id = reg->sel_reg_dev_password_id_override;
532 if (id != DEV_PW_PUSHBUTTON || !reg->dualband)
533 return 0;
534 return wps_build_uuid_e(msg, reg->wps->uuid);
535 }
536
537
wps_set_pushbutton(u16 * methods,u16 conf_methods)538 static void wps_set_pushbutton(u16 *methods, u16 conf_methods)
539 {
540 *methods |= WPS_CONFIG_PUSHBUTTON;
541 if ((conf_methods & WPS_CONFIG_VIRT_PUSHBUTTON) ==
542 WPS_CONFIG_VIRT_PUSHBUTTON)
543 *methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
544 if ((conf_methods & WPS_CONFIG_PHY_PUSHBUTTON) ==
545 WPS_CONFIG_PHY_PUSHBUTTON)
546 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
547 if ((*methods & WPS_CONFIG_VIRT_PUSHBUTTON) !=
548 WPS_CONFIG_VIRT_PUSHBUTTON &&
549 (*methods & WPS_CONFIG_PHY_PUSHBUTTON) !=
550 WPS_CONFIG_PHY_PUSHBUTTON) {
551 /*
552 * Required to include virtual/physical flag, but we were not
553 * configured with push button type, so have to default to one
554 * of them.
555 */
556 *methods |= WPS_CONFIG_PHY_PUSHBUTTON;
557 }
558 }
559
560
wps_build_sel_reg_config_methods(struct wps_registrar * reg,struct wpabuf * msg)561 static int wps_build_sel_reg_config_methods(struct wps_registrar *reg,
562 struct wpabuf *msg)
563 {
564 u16 methods;
565 if (!reg->sel_reg_union)
566 return 0;
567 methods = reg->wps->config_methods;
568 methods &= ~WPS_CONFIG_PUSHBUTTON;
569 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
570 WPS_CONFIG_PHY_PUSHBUTTON);
571 if (reg->pbc)
572 wps_set_pushbutton(&methods, reg->wps->config_methods);
573 if (reg->sel_reg_config_methods_override >= 0)
574 methods = reg->sel_reg_config_methods_override;
575 wpa_printf(MSG_DEBUG, "WPS: * Selected Registrar Config Methods (%x)",
576 methods);
577 wpabuf_put_be16(msg, ATTR_SELECTED_REGISTRAR_CONFIG_METHODS);
578 wpabuf_put_be16(msg, 2);
579 wpabuf_put_be16(msg, methods);
580 return 0;
581 }
582
583
wps_build_probe_config_methods(struct wps_registrar * reg,struct wpabuf * msg)584 static int wps_build_probe_config_methods(struct wps_registrar *reg,
585 struct wpabuf *msg)
586 {
587 u16 methods;
588 /*
589 * These are the methods that the AP supports as an Enrollee for adding
590 * external Registrars.
591 */
592 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
593 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
594 WPS_CONFIG_PHY_PUSHBUTTON);
595 wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods);
596 wpabuf_put_be16(msg, ATTR_CONFIG_METHODS);
597 wpabuf_put_be16(msg, 2);
598 wpabuf_put_be16(msg, methods);
599 return 0;
600 }
601
602
wps_build_config_methods_r(struct wps_registrar * reg,struct wpabuf * msg)603 static int wps_build_config_methods_r(struct wps_registrar *reg,
604 struct wpabuf *msg)
605 {
606 return wps_build_config_methods(msg, reg->wps->config_methods);
607 }
608
609
wps_authorized_macs(struct wps_registrar * reg,size_t * count)610 const u8 * wps_authorized_macs(struct wps_registrar *reg, size_t *count)
611 {
612 *count = 0;
613
614 while (*count < WPS_MAX_AUTHORIZED_MACS) {
615 if (is_zero_ether_addr(reg->authorized_macs_union[*count]))
616 break;
617 (*count)++;
618 }
619
620 return (const u8 *) reg->authorized_macs_union;
621 }
622
623
624 /**
625 * wps_registrar_init - Initialize WPS Registrar data
626 * @wps: Pointer to longterm WPS context
627 * @cfg: Registrar configuration
628 * Returns: Pointer to allocated Registrar data or %NULL on failure
629 *
630 * This function is used to initialize WPS Registrar functionality. It can be
631 * used for a single Registrar run (e.g., when run in a supplicant) or multiple
632 * runs (e.g., when run as an internal Registrar in an AP). Caller is
633 * responsible for freeing the returned data with wps_registrar_deinit() when
634 * Registrar functionality is not needed anymore.
635 */
636 struct wps_registrar *
wps_registrar_init(struct wps_context * wps,const struct wps_registrar_config * cfg)637 wps_registrar_init(struct wps_context *wps,
638 const struct wps_registrar_config *cfg)
639 {
640 struct wps_registrar *reg = os_zalloc(sizeof(*reg));
641 if (reg == NULL)
642 return NULL;
643
644 dl_list_init(®->pins);
645 dl_list_init(®->nfc_pw_tokens);
646 reg->wps = wps;
647 reg->new_psk_cb = cfg->new_psk_cb;
648 reg->set_ie_cb = cfg->set_ie_cb;
649 reg->pin_needed_cb = cfg->pin_needed_cb;
650 reg->reg_success_cb = cfg->reg_success_cb;
651 reg->set_sel_reg_cb = cfg->set_sel_reg_cb;
652 reg->enrollee_seen_cb = cfg->enrollee_seen_cb;
653 reg->cb_ctx = cfg->cb_ctx;
654 reg->skip_cred_build = cfg->skip_cred_build;
655 if (cfg->extra_cred) {
656 reg->extra_cred = wpabuf_alloc_copy(cfg->extra_cred,
657 cfg->extra_cred_len);
658 if (reg->extra_cred == NULL) {
659 os_free(reg);
660 return NULL;
661 }
662 }
663 reg->disable_auto_conf = cfg->disable_auto_conf;
664 reg->sel_reg_dev_password_id_override = -1;
665 reg->sel_reg_config_methods_override = -1;
666 reg->static_wep_only = cfg->static_wep_only;
667 reg->dualband = cfg->dualband;
668 reg->force_per_enrollee_psk = cfg->force_per_enrollee_psk;
669
670 if (wps_set_ie(reg)) {
671 wps_registrar_deinit(reg);
672 return NULL;
673 }
674
675 return reg;
676 }
677
678
wps_registrar_flush(struct wps_registrar * reg)679 void wps_registrar_flush(struct wps_registrar *reg)
680 {
681 if (reg == NULL)
682 return;
683 wps_free_pins(®->pins);
684 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, 0);
685 wps_free_pbc_sessions(reg->pbc_sessions);
686 reg->pbc_sessions = NULL;
687 wps_free_devices(reg->devices);
688 reg->devices = NULL;
689 #ifdef WPS_WORKAROUNDS
690 reg->pbc_ignore_start.sec = 0;
691 #endif /* WPS_WORKAROUNDS */
692 }
693
694
695 /**
696 * wps_registrar_deinit - Deinitialize WPS Registrar data
697 * @reg: Registrar data from wps_registrar_init()
698 */
wps_registrar_deinit(struct wps_registrar * reg)699 void wps_registrar_deinit(struct wps_registrar *reg)
700 {
701 if (reg == NULL)
702 return;
703 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
704 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
705 wps_registrar_flush(reg);
706 wpabuf_free(reg->extra_cred);
707 os_free(reg);
708 }
709
710
wps_registrar_invalidate_unused(struct wps_registrar * reg)711 static void wps_registrar_invalidate_unused(struct wps_registrar *reg)
712 {
713 struct wps_uuid_pin *pin;
714
715 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) {
716 if (pin->wildcard_uuid == 1 && !(pin->flags & PIN_LOCKED)) {
717 wpa_printf(MSG_DEBUG, "WPS: Invalidate previously "
718 "configured wildcard PIN");
719 wps_registrar_remove_pin(reg, pin);
720 break;
721 }
722 }
723 }
724
725
726 /**
727 * wps_registrar_add_pin - Configure a new PIN for Registrar
728 * @reg: Registrar data from wps_registrar_init()
729 * @addr: Enrollee MAC address or %NULL if not known
730 * @uuid: UUID-E or %NULL for wildcard (any UUID)
731 * @pin: PIN (Device Password)
732 * @pin_len: Length of pin in octets
733 * @timeout: Time (in seconds) when the PIN will be invalidated; 0 = no timeout
734 * Returns: 0 on success, -1 on failure
735 */
wps_registrar_add_pin(struct wps_registrar * reg,const u8 * addr,const u8 * uuid,const u8 * pin,size_t pin_len,int timeout)736 int wps_registrar_add_pin(struct wps_registrar *reg, const u8 *addr,
737 const u8 *uuid, const u8 *pin, size_t pin_len,
738 int timeout)
739 {
740 struct wps_uuid_pin *p;
741
742 p = os_zalloc(sizeof(*p));
743 if (p == NULL)
744 return -1;
745 if (addr)
746 os_memcpy(p->enrollee_addr, addr, ETH_ALEN);
747 if (uuid == NULL)
748 p->wildcard_uuid = 1;
749 else
750 os_memcpy(p->uuid, uuid, WPS_UUID_LEN);
751 p->pin = os_malloc(pin_len);
752 if (p->pin == NULL) {
753 os_free(p);
754 return -1;
755 }
756 os_memcpy(p->pin, pin, pin_len);
757 p->pin_len = pin_len;
758
759 if (timeout) {
760 p->flags |= PIN_EXPIRES;
761 os_get_reltime(&p->expiration);
762 p->expiration.sec += timeout;
763 }
764
765 if (p->wildcard_uuid)
766 wps_registrar_invalidate_unused(reg);
767
768 dl_list_add(®->pins, &p->list);
769
770 wpa_printf(MSG_DEBUG, "WPS: A new PIN configured (timeout=%d)",
771 timeout);
772 wpa_hexdump(MSG_DEBUG, "WPS: UUID", uuid, WPS_UUID_LEN);
773 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: PIN", pin, pin_len);
774 reg->selected_registrar = 1;
775 reg->pbc = 0;
776 if (addr)
777 wps_registrar_add_authorized_mac(reg, addr);
778 else
779 wps_registrar_add_authorized_mac(
780 reg, (u8 *) "\xff\xff\xff\xff\xff\xff");
781 wps_registrar_selected_registrar_changed(reg, 0);
782 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
783 eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
784 wps_registrar_set_selected_timeout,
785 reg, NULL);
786
787 return 0;
788 }
789
790
wps_registrar_remove_pin(struct wps_registrar * reg,struct wps_uuid_pin * pin)791 static void wps_registrar_remove_pin(struct wps_registrar *reg,
792 struct wps_uuid_pin *pin)
793 {
794 u8 *addr;
795 u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
796
797 if (is_zero_ether_addr(pin->enrollee_addr))
798 addr = bcast;
799 else
800 addr = pin->enrollee_addr;
801 wps_registrar_remove_authorized_mac(reg, addr);
802 wps_remove_pin(pin);
803 wps_registrar_selected_registrar_changed(reg, 0);
804 }
805
806
wps_registrar_expire_pins(struct wps_registrar * reg)807 static void wps_registrar_expire_pins(struct wps_registrar *reg)
808 {
809 struct wps_uuid_pin *pin, *prev;
810 struct os_reltime now;
811
812 os_get_reltime(&now);
813 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list)
814 {
815 if ((pin->flags & PIN_EXPIRES) &&
816 os_reltime_before(&pin->expiration, &now)) {
817 wpa_hexdump(MSG_DEBUG, "WPS: Expired PIN for UUID",
818 pin->uuid, WPS_UUID_LEN);
819 wps_registrar_remove_pin(reg, pin);
820 }
821 }
822 }
823
824
825 /**
826 * wps_registrar_invalidate_wildcard_pin - Invalidate a wildcard PIN
827 * @reg: Registrar data from wps_registrar_init()
828 * @dev_pw: PIN to search for or %NULL to match any
829 * @dev_pw_len: Length of dev_pw in octets
830 * Returns: 0 on success, -1 if not wildcard PIN is enabled
831 */
wps_registrar_invalidate_wildcard_pin(struct wps_registrar * reg,const u8 * dev_pw,size_t dev_pw_len)832 static int wps_registrar_invalidate_wildcard_pin(struct wps_registrar *reg,
833 const u8 *dev_pw,
834 size_t dev_pw_len)
835 {
836 struct wps_uuid_pin *pin, *prev;
837
838 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list)
839 {
840 if (dev_pw && pin->pin &&
841 (dev_pw_len != pin->pin_len ||
842 os_memcmp_const(dev_pw, pin->pin, dev_pw_len) != 0))
843 continue; /* different PIN */
844 if (pin->wildcard_uuid) {
845 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
846 pin->uuid, WPS_UUID_LEN);
847 wps_registrar_remove_pin(reg, pin);
848 return 0;
849 }
850 }
851
852 return -1;
853 }
854
855
856 /**
857 * wps_registrar_invalidate_pin - Invalidate a PIN for a specific UUID-E
858 * @reg: Registrar data from wps_registrar_init()
859 * @uuid: UUID-E
860 * Returns: 0 on success, -1 on failure (e.g., PIN not found)
861 */
wps_registrar_invalidate_pin(struct wps_registrar * reg,const u8 * uuid)862 int wps_registrar_invalidate_pin(struct wps_registrar *reg, const u8 *uuid)
863 {
864 struct wps_uuid_pin *pin, *prev;
865
866 dl_list_for_each_safe(pin, prev, ®->pins, struct wps_uuid_pin, list)
867 {
868 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
869 wpa_hexdump(MSG_DEBUG, "WPS: Invalidated PIN for UUID",
870 pin->uuid, WPS_UUID_LEN);
871 wps_registrar_remove_pin(reg, pin);
872 return 0;
873 }
874 }
875
876 return -1;
877 }
878
879
wps_registrar_get_pin(struct wps_registrar * reg,const u8 * uuid,size_t * pin_len)880 static const u8 * wps_registrar_get_pin(struct wps_registrar *reg,
881 const u8 *uuid, size_t *pin_len)
882 {
883 struct wps_uuid_pin *pin, *found = NULL;
884
885 wps_registrar_expire_pins(reg);
886
887 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) {
888 if (!pin->wildcard_uuid &&
889 os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
890 found = pin;
891 break;
892 }
893 }
894
895 if (!found) {
896 /* Check for wildcard UUIDs since none of the UUID-specific
897 * PINs matched */
898 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) {
899 if (pin->wildcard_uuid == 1 ||
900 pin->wildcard_uuid == 2) {
901 wpa_printf(MSG_DEBUG, "WPS: Found a wildcard "
902 "PIN. Assigned it for this UUID-E");
903 pin->wildcard_uuid++;
904 os_memcpy(pin->uuid, uuid, WPS_UUID_LEN);
905 found = pin;
906 break;
907 }
908 }
909 }
910
911 if (!found)
912 return NULL;
913
914 /*
915 * Lock the PIN to avoid attacks based on concurrent re-use of the PIN
916 * that could otherwise avoid PIN invalidations.
917 */
918 if (found->flags & PIN_LOCKED) {
919 wpa_printf(MSG_DEBUG, "WPS: Selected PIN locked - do not "
920 "allow concurrent re-use");
921 return NULL;
922 }
923 *pin_len = found->pin_len;
924 found->flags |= PIN_LOCKED;
925 return found->pin;
926 }
927
928
929 /**
930 * wps_registrar_unlock_pin - Unlock a PIN for a specific UUID-E
931 * @reg: Registrar data from wps_registrar_init()
932 * @uuid: UUID-E
933 * Returns: 0 on success, -1 on failure
934 *
935 * PINs are locked to enforce only one concurrent use. This function unlocks a
936 * PIN to allow it to be used again. If the specified PIN was configured using
937 * a wildcard UUID, it will be removed instead of allowing multiple uses.
938 */
wps_registrar_unlock_pin(struct wps_registrar * reg,const u8 * uuid)939 int wps_registrar_unlock_pin(struct wps_registrar *reg, const u8 *uuid)
940 {
941 struct wps_uuid_pin *pin;
942
943 dl_list_for_each(pin, ®->pins, struct wps_uuid_pin, list) {
944 if (os_memcmp(pin->uuid, uuid, WPS_UUID_LEN) == 0) {
945 if (pin->wildcard_uuid == 3) {
946 wpa_printf(MSG_DEBUG, "WPS: Invalidating used "
947 "wildcard PIN");
948 return wps_registrar_invalidate_pin(reg, uuid);
949 }
950 pin->flags &= ~PIN_LOCKED;
951 return 0;
952 }
953 }
954
955 return -1;
956 }
957
958
wps_registrar_stop_pbc(struct wps_registrar * reg)959 static void wps_registrar_stop_pbc(struct wps_registrar *reg)
960 {
961 reg->selected_registrar = 0;
962 reg->pbc = 0;
963 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
964 wps_registrar_remove_authorized_mac(reg,
965 (u8 *) "\xff\xff\xff\xff\xff\xff");
966 wps_registrar_selected_registrar_changed(reg, 0);
967 }
968
969
wps_registrar_pbc_timeout(void * eloop_ctx,void * timeout_ctx)970 static void wps_registrar_pbc_timeout(void *eloop_ctx, void *timeout_ctx)
971 {
972 struct wps_registrar *reg = eloop_ctx;
973
974 wpa_printf(MSG_DEBUG, "WPS: PBC timed out - disable PBC mode");
975 wps_pbc_timeout_event(reg->wps);
976 wps_registrar_stop_pbc(reg);
977 }
978
979
980 /**
981 * wps_registrar_button_pushed - Notify Registrar that AP button was pushed
982 * @reg: Registrar data from wps_registrar_init()
983 * @p2p_dev_addr: Limit allowed PBC devices to the specified P2P device, %NULL
984 * indicates no such filtering
985 * Returns: 0 on success, -1 on failure, -2 on session overlap
986 *
987 * This function is called on an AP when a push button is pushed to activate
988 * PBC mode. The PBC mode will be stopped after walk time (2 minutes) timeout
989 * or when a PBC registration is completed. If more than one Enrollee in active
990 * PBC mode has been detected during the monitor time (previous 2 minutes), the
991 * PBC mode is not activated and -2 is returned to indicate session overlap.
992 * This is skipped if a specific Enrollee is selected.
993 */
wps_registrar_button_pushed(struct wps_registrar * reg,const u8 * p2p_dev_addr)994 int wps_registrar_button_pushed(struct wps_registrar *reg,
995 const u8 *p2p_dev_addr)
996 {
997 if (p2p_dev_addr == NULL &&
998 wps_registrar_pbc_overlap(reg, NULL, NULL)) {
999 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - do not start PBC "
1000 "mode");
1001 wps_pbc_overlap_event(reg->wps);
1002 return -2;
1003 }
1004 wpa_printf(MSG_DEBUG, "WPS: Button pushed - PBC mode started");
1005 reg->force_pbc_overlap = 0;
1006 reg->selected_registrar = 1;
1007 reg->pbc = 1;
1008 if (p2p_dev_addr)
1009 os_memcpy(reg->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
1010 else
1011 os_memset(reg->p2p_dev_addr, 0, ETH_ALEN);
1012 wps_registrar_add_authorized_mac(reg,
1013 (u8 *) "\xff\xff\xff\xff\xff\xff");
1014 wps_registrar_selected_registrar_changed(reg, 0);
1015
1016 wps_pbc_active_event(reg->wps);
1017 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
1018 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1019 eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wps_registrar_pbc_timeout,
1020 reg, NULL);
1021 return 0;
1022 }
1023
1024
wps_registrar_pbc_completed(struct wps_registrar * reg)1025 static void wps_registrar_pbc_completed(struct wps_registrar *reg)
1026 {
1027 wpa_printf(MSG_DEBUG, "WPS: PBC completed - stopping PBC mode");
1028 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1029 wps_registrar_stop_pbc(reg);
1030 wps_pbc_disable_event(reg->wps);
1031 }
1032
1033
wps_registrar_pin_completed(struct wps_registrar * reg)1034 static void wps_registrar_pin_completed(struct wps_registrar *reg)
1035 {
1036 wpa_printf(MSG_DEBUG, "WPS: PIN completed using internal Registrar");
1037 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
1038 reg->selected_registrar = 0;
1039 wps_registrar_selected_registrar_changed(reg, 0);
1040 }
1041
1042
wps_registrar_complete(struct wps_registrar * registrar,const u8 * uuid_e,const u8 * dev_pw,size_t dev_pw_len)1043 void wps_registrar_complete(struct wps_registrar *registrar, const u8 *uuid_e,
1044 const u8 *dev_pw, size_t dev_pw_len)
1045 {
1046 if (registrar->pbc) {
1047 wps_registrar_remove_pbc_session(registrar,
1048 uuid_e, NULL);
1049 wps_registrar_pbc_completed(registrar);
1050 #ifdef WPS_WORKAROUNDS
1051 os_get_reltime(®istrar->pbc_ignore_start);
1052 #endif /* WPS_WORKAROUNDS */
1053 os_memcpy(registrar->pbc_ignore_uuid, uuid_e, WPS_UUID_LEN);
1054 } else {
1055 wps_registrar_pin_completed(registrar);
1056 }
1057
1058 if (dev_pw &&
1059 wps_registrar_invalidate_wildcard_pin(registrar, dev_pw,
1060 dev_pw_len) == 0) {
1061 wpa_hexdump_key(MSG_DEBUG, "WPS: Invalidated wildcard PIN",
1062 dev_pw, dev_pw_len);
1063 }
1064 }
1065
1066
wps_registrar_wps_cancel(struct wps_registrar * reg)1067 int wps_registrar_wps_cancel(struct wps_registrar *reg)
1068 {
1069 if (reg->pbc) {
1070 wpa_printf(MSG_DEBUG, "WPS: PBC is set - cancelling it");
1071 wps_registrar_pbc_timeout(reg, NULL);
1072 eloop_cancel_timeout(wps_registrar_pbc_timeout, reg, NULL);
1073 return 1;
1074 } else if (reg->selected_registrar) {
1075 /* PIN Method */
1076 wpa_printf(MSG_DEBUG, "WPS: PIN is set - cancelling it");
1077 wps_registrar_pin_completed(reg);
1078 wps_registrar_invalidate_wildcard_pin(reg, NULL, 0);
1079 return 1;
1080 }
1081 return 0;
1082 }
1083
1084
1085 /**
1086 * wps_registrar_probe_req_rx - Notify Registrar of Probe Request
1087 * @reg: Registrar data from wps_registrar_init()
1088 * @addr: MAC address of the Probe Request sender
1089 * @wps_data: WPS IE contents
1090 *
1091 * This function is called on an AP when a Probe Request with WPS IE is
1092 * received. This is used to track PBC mode use and to detect possible overlap
1093 * situation with other WPS APs.
1094 */
wps_registrar_probe_req_rx(struct wps_registrar * reg,const u8 * addr,const struct wpabuf * wps_data,int p2p_wildcard)1095 void wps_registrar_probe_req_rx(struct wps_registrar *reg, const u8 *addr,
1096 const struct wpabuf *wps_data,
1097 int p2p_wildcard)
1098 {
1099 struct wps_parse_attr attr;
1100 int skip_add = 0;
1101
1102 wpa_hexdump_buf(MSG_MSGDUMP,
1103 "WPS: Probe Request with WPS data received",
1104 wps_data);
1105
1106 if (wps_parse_msg(wps_data, &attr) < 0)
1107 return;
1108
1109 if (attr.config_methods == NULL) {
1110 wpa_printf(MSG_DEBUG, "WPS: No Config Methods attribute in "
1111 "Probe Request");
1112 return;
1113 }
1114
1115 if (attr.dev_password_id == NULL) {
1116 wpa_printf(MSG_DEBUG, "WPS: No Device Password Id attribute "
1117 "in Probe Request");
1118 return;
1119 }
1120
1121 if (reg->enrollee_seen_cb && attr.uuid_e &&
1122 attr.primary_dev_type && attr.request_type && !p2p_wildcard) {
1123 char *dev_name = NULL;
1124 if (attr.dev_name) {
1125 dev_name = os_zalloc(attr.dev_name_len + 1);
1126 if (dev_name) {
1127 os_memcpy(dev_name, attr.dev_name,
1128 attr.dev_name_len);
1129 }
1130 }
1131 reg->enrollee_seen_cb(reg->cb_ctx, addr, attr.uuid_e,
1132 attr.primary_dev_type,
1133 WPA_GET_BE16(attr.config_methods),
1134 WPA_GET_BE16(attr.dev_password_id),
1135 *attr.request_type, dev_name);
1136 os_free(dev_name);
1137 }
1138
1139 if (WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
1140 return; /* Not PBC */
1141
1142 wpa_printf(MSG_DEBUG, "WPS: Probe Request for PBC received from "
1143 MACSTR, MAC2STR(addr));
1144 if (attr.uuid_e == NULL) {
1145 wpa_printf(MSG_DEBUG, "WPS: Invalid Probe Request WPS IE: No "
1146 "UUID-E included");
1147 return;
1148 }
1149 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E from Probe Request", attr.uuid_e,
1150 WPS_UUID_LEN);
1151
1152 #ifdef WPS_WORKAROUNDS
1153 if (reg->pbc_ignore_start.sec &&
1154 os_memcmp(attr.uuid_e, reg->pbc_ignore_uuid, WPS_UUID_LEN) == 0) {
1155 struct os_reltime now, dur;
1156 os_get_reltime(&now);
1157 os_reltime_sub(&now, ®->pbc_ignore_start, &dur);
1158 if (dur.sec >= 0 && dur.sec < 5) {
1159 wpa_printf(MSG_DEBUG, "WPS: Ignore PBC activation "
1160 "based on Probe Request from the Enrollee "
1161 "that just completed PBC provisioning");
1162 skip_add = 1;
1163 } else
1164 reg->pbc_ignore_start.sec = 0;
1165 }
1166 #endif /* WPS_WORKAROUNDS */
1167
1168 if (!skip_add)
1169 wps_registrar_add_pbc_session(reg, addr, attr.uuid_e);
1170 if (wps_registrar_pbc_overlap(reg, addr, attr.uuid_e)) {
1171 wpa_printf(MSG_DEBUG, "WPS: PBC session overlap detected");
1172 reg->force_pbc_overlap = 1;
1173 wps_pbc_overlap_event(reg->wps);
1174 }
1175 }
1176
1177
wps_cb_new_psk(struct wps_registrar * reg,const u8 * mac_addr,const u8 * p2p_dev_addr,const u8 * psk,size_t psk_len)1178 int wps_cb_new_psk(struct wps_registrar *reg, const u8 *mac_addr,
1179 const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len)
1180 {
1181 if (reg->new_psk_cb == NULL)
1182 return 0;
1183
1184 return reg->new_psk_cb(reg->cb_ctx, mac_addr, p2p_dev_addr, psk,
1185 psk_len);
1186 }
1187
1188
wps_cb_pin_needed(struct wps_registrar * reg,const u8 * uuid_e,const struct wps_device_data * dev)1189 static void wps_cb_pin_needed(struct wps_registrar *reg, const u8 *uuid_e,
1190 const struct wps_device_data *dev)
1191 {
1192 if (reg->pin_needed_cb == NULL)
1193 return;
1194
1195 reg->pin_needed_cb(reg->cb_ctx, uuid_e, dev);
1196 }
1197
1198
wps_cb_reg_success(struct wps_registrar * reg,const u8 * mac_addr,const u8 * uuid_e,const u8 * dev_pw,size_t dev_pw_len)1199 static void wps_cb_reg_success(struct wps_registrar *reg, const u8 *mac_addr,
1200 const u8 *uuid_e, const u8 *dev_pw,
1201 size_t dev_pw_len)
1202 {
1203 if (reg->reg_success_cb == NULL)
1204 return;
1205
1206 reg->reg_success_cb(reg->cb_ctx, mac_addr, uuid_e, dev_pw, dev_pw_len);
1207 }
1208
1209
wps_cb_set_ie(struct wps_registrar * reg,struct wpabuf * beacon_ie,struct wpabuf * probe_resp_ie)1210 static int wps_cb_set_ie(struct wps_registrar *reg, struct wpabuf *beacon_ie,
1211 struct wpabuf *probe_resp_ie)
1212 {
1213 return reg->set_ie_cb(reg->cb_ctx, beacon_ie, probe_resp_ie);
1214 }
1215
1216
wps_cb_set_sel_reg(struct wps_registrar * reg)1217 static void wps_cb_set_sel_reg(struct wps_registrar *reg)
1218 {
1219 u16 methods = 0;
1220 if (reg->set_sel_reg_cb == NULL)
1221 return;
1222
1223 if (reg->selected_registrar) {
1224 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
1225 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
1226 WPS_CONFIG_PHY_PUSHBUTTON);
1227 if (reg->pbc)
1228 wps_set_pushbutton(&methods, reg->wps->config_methods);
1229 }
1230
1231 wpa_printf(MSG_DEBUG, "WPS: wps_cb_set_sel_reg: sel_reg=%d "
1232 "config_methods=0x%x pbc=%d methods=0x%x",
1233 reg->selected_registrar, reg->wps->config_methods,
1234 reg->pbc, methods);
1235
1236 reg->set_sel_reg_cb(reg->cb_ctx, reg->selected_registrar,
1237 reg->pbc ? DEV_PW_PUSHBUTTON : DEV_PW_DEFAULT,
1238 methods);
1239 }
1240
1241
wps_set_ie(struct wps_registrar * reg)1242 static int wps_set_ie(struct wps_registrar *reg)
1243 {
1244 struct wpabuf *beacon;
1245 struct wpabuf *probe;
1246 const u8 *auth_macs;
1247 size_t count;
1248 size_t vendor_len = 0;
1249 int i;
1250
1251 if (reg->set_ie_cb == NULL)
1252 return 0;
1253
1254 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) {
1255 if (reg->wps->dev.vendor_ext[i]) {
1256 vendor_len += 2 + 2;
1257 vendor_len += wpabuf_len(reg->wps->dev.vendor_ext[i]);
1258 }
1259 }
1260
1261 beacon = wpabuf_alloc(400 + vendor_len);
1262 if (beacon == NULL)
1263 return -1;
1264 probe = wpabuf_alloc(500 + vendor_len);
1265 if (probe == NULL) {
1266 wpabuf_free(beacon);
1267 return -1;
1268 }
1269
1270 auth_macs = wps_authorized_macs(reg, &count);
1271
1272 wpa_printf(MSG_DEBUG, "WPS: Build Beacon IEs");
1273
1274 if (wps_build_version(beacon) ||
1275 wps_build_wps_state(reg->wps, beacon) ||
1276 wps_build_ap_setup_locked(reg->wps, beacon) ||
1277 wps_build_selected_registrar(reg, beacon) ||
1278 wps_build_sel_reg_dev_password_id(reg, beacon) ||
1279 wps_build_sel_reg_config_methods(reg, beacon) ||
1280 wps_build_sel_pbc_reg_uuid_e(reg, beacon) ||
1281 (reg->dualband && wps_build_rf_bands(®->wps->dev, beacon, 0)) ||
1282 wps_build_wfa_ext(beacon, 0, auth_macs, count) ||
1283 wps_build_vendor_ext(®->wps->dev, beacon)) {
1284 wpabuf_free(beacon);
1285 wpabuf_free(probe);
1286 return -1;
1287 }
1288
1289 #ifdef CONFIG_P2P
1290 if (wps_build_dev_name(®->wps->dev, beacon) ||
1291 wps_build_primary_dev_type(®->wps->dev, beacon)) {
1292 wpabuf_free(beacon);
1293 wpabuf_free(probe);
1294 return -1;
1295 }
1296 #endif /* CONFIG_P2P */
1297
1298 wpa_printf(MSG_DEBUG, "WPS: Build Probe Response IEs");
1299
1300 if (wps_build_version(probe) ||
1301 wps_build_wps_state(reg->wps, probe) ||
1302 wps_build_ap_setup_locked(reg->wps, probe) ||
1303 wps_build_selected_registrar(reg, probe) ||
1304 wps_build_sel_reg_dev_password_id(reg, probe) ||
1305 wps_build_sel_reg_config_methods(reg, probe) ||
1306 wps_build_resp_type(probe, reg->wps->ap ? WPS_RESP_AP :
1307 WPS_RESP_REGISTRAR) ||
1308 wps_build_uuid_e(probe, reg->wps->uuid) ||
1309 wps_build_device_attrs(®->wps->dev, probe) ||
1310 wps_build_probe_config_methods(reg, probe) ||
1311 (reg->dualband && wps_build_rf_bands(®->wps->dev, probe, 0)) ||
1312 wps_build_wfa_ext(probe, 0, auth_macs, count) ||
1313 wps_build_vendor_ext(®->wps->dev, probe)) {
1314 wpabuf_free(beacon);
1315 wpabuf_free(probe);
1316 return -1;
1317 }
1318
1319 beacon = wps_ie_encapsulate(beacon);
1320 probe = wps_ie_encapsulate(probe);
1321
1322 if (!beacon || !probe) {
1323 wpabuf_free(beacon);
1324 wpabuf_free(probe);
1325 return -1;
1326 }
1327
1328 if (reg->static_wep_only) {
1329 /*
1330 * Windows XP and Vista clients can get confused about
1331 * EAP-Identity/Request when they probe the network with
1332 * EAPOL-Start. In such a case, they may assume the network is
1333 * using IEEE 802.1X and prompt user for a certificate while
1334 * the correct (non-WPS) behavior would be to ask for the
1335 * static WEP key. As a workaround, use Microsoft Provisioning
1336 * IE to advertise that legacy 802.1X is not supported.
1337 */
1338 const u8 ms_wps[7] = {
1339 WLAN_EID_VENDOR_SPECIFIC, 5,
1340 /* Microsoft Provisioning IE (00:50:f2:5) */
1341 0x00, 0x50, 0xf2, 5,
1342 0x00 /* no legacy 802.1X or MS WPS */
1343 };
1344 wpa_printf(MSG_DEBUG, "WPS: Add Microsoft Provisioning IE "
1345 "into Beacon/Probe Response frames");
1346 wpabuf_put_data(beacon, ms_wps, sizeof(ms_wps));
1347 wpabuf_put_data(probe, ms_wps, sizeof(ms_wps));
1348 }
1349
1350 return wps_cb_set_ie(reg, beacon, probe);
1351 }
1352
1353
wps_get_dev_password(struct wps_data * wps)1354 static int wps_get_dev_password(struct wps_data *wps)
1355 {
1356 const u8 *pin;
1357 size_t pin_len = 0;
1358
1359 bin_clear_free(wps->dev_password, wps->dev_password_len);
1360 wps->dev_password = NULL;
1361
1362 if (wps->pbc) {
1363 wpa_printf(MSG_DEBUG, "WPS: Use default PIN for PBC");
1364 pin = (const u8 *) "00000000";
1365 pin_len = 8;
1366 #ifdef CONFIG_WPS_NFC
1367 } else if (wps->nfc_pw_token) {
1368 if (wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER)
1369 {
1370 wpa_printf(MSG_DEBUG, "WPS: Using NFC connection "
1371 "handover and abbreviated WPS handshake "
1372 "without Device Password");
1373 return 0;
1374 }
1375 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from NFC "
1376 "Password Token");
1377 pin = wps->nfc_pw_token->dev_pw;
1378 pin_len = wps->nfc_pw_token->dev_pw_len;
1379 } else if (wps->dev_pw_id >= 0x10 &&
1380 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id &&
1381 wps->wps->ap_nfc_dev_pw) {
1382 wpa_printf(MSG_DEBUG, "WPS: Use OOB Device Password from own NFC Password Token");
1383 pin = wpabuf_head(wps->wps->ap_nfc_dev_pw);
1384 pin_len = wpabuf_len(wps->wps->ap_nfc_dev_pw);
1385 #endif /* CONFIG_WPS_NFC */
1386 } else {
1387 pin = wps_registrar_get_pin(wps->wps->registrar, wps->uuid_e,
1388 &pin_len);
1389 if (pin && wps->dev_pw_id >= 0x10) {
1390 wpa_printf(MSG_DEBUG, "WPS: No match for OOB Device "
1391 "Password ID, but PIN found");
1392 /*
1393 * See whether Enrollee is willing to use PIN instead.
1394 */
1395 wps->dev_pw_id = DEV_PW_DEFAULT;
1396 }
1397 }
1398 if (pin == NULL) {
1399 wpa_printf(MSG_DEBUG, "WPS: No Device Password available for "
1400 "the Enrollee (context %p registrar %p)",
1401 wps->wps, wps->wps->registrar);
1402 wps_cb_pin_needed(wps->wps->registrar, wps->uuid_e,
1403 &wps->peer_dev);
1404 return -1;
1405 }
1406
1407 wps->dev_password = os_malloc(pin_len);
1408 if (wps->dev_password == NULL)
1409 return -1;
1410 os_memcpy(wps->dev_password, pin, pin_len);
1411 wps->dev_password_len = pin_len;
1412
1413 return 0;
1414 }
1415
1416
wps_build_uuid_r(struct wps_data * wps,struct wpabuf * msg)1417 static int wps_build_uuid_r(struct wps_data *wps, struct wpabuf *msg)
1418 {
1419 wpa_printf(MSG_DEBUG, "WPS: * UUID-R");
1420 wpabuf_put_be16(msg, ATTR_UUID_R);
1421 wpabuf_put_be16(msg, WPS_UUID_LEN);
1422 wpabuf_put_data(msg, wps->uuid_r, WPS_UUID_LEN);
1423 return 0;
1424 }
1425
1426
wps_build_r_hash(struct wps_data * wps,struct wpabuf * msg)1427 static int wps_build_r_hash(struct wps_data *wps, struct wpabuf *msg)
1428 {
1429 u8 *hash;
1430 const u8 *addr[4];
1431 size_t len[4];
1432
1433 if (random_get_bytes(wps->snonce, 2 * WPS_SECRET_NONCE_LEN) < 0)
1434 return -1;
1435 wpa_hexdump(MSG_DEBUG, "WPS: R-S1", wps->snonce, WPS_SECRET_NONCE_LEN);
1436 wpa_hexdump(MSG_DEBUG, "WPS: R-S2",
1437 wps->snonce + WPS_SECRET_NONCE_LEN, WPS_SECRET_NONCE_LEN);
1438
1439 if (wps->dh_pubkey_e == NULL || wps->dh_pubkey_r == NULL) {
1440 wpa_printf(MSG_DEBUG, "WPS: DH public keys not available for "
1441 "R-Hash derivation");
1442 return -1;
1443 }
1444
1445 wpa_printf(MSG_DEBUG, "WPS: * R-Hash1");
1446 wpabuf_put_be16(msg, ATTR_R_HASH1);
1447 wpabuf_put_be16(msg, SHA256_MAC_LEN);
1448 hash = wpabuf_put(msg, SHA256_MAC_LEN);
1449 /* R-Hash1 = HMAC_AuthKey(R-S1 || PSK1 || PK_E || PK_R) */
1450 addr[0] = wps->snonce;
1451 len[0] = WPS_SECRET_NONCE_LEN;
1452 addr[1] = wps->psk1;
1453 len[1] = WPS_PSK_LEN;
1454 addr[2] = wpabuf_head(wps->dh_pubkey_e);
1455 len[2] = wpabuf_len(wps->dh_pubkey_e);
1456 addr[3] = wpabuf_head(wps->dh_pubkey_r);
1457 len[3] = wpabuf_len(wps->dh_pubkey_r);
1458 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1459 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash1", hash, SHA256_MAC_LEN);
1460
1461 wpa_printf(MSG_DEBUG, "WPS: * R-Hash2");
1462 wpabuf_put_be16(msg, ATTR_R_HASH2);
1463 wpabuf_put_be16(msg, SHA256_MAC_LEN);
1464 hash = wpabuf_put(msg, SHA256_MAC_LEN);
1465 /* R-Hash2 = HMAC_AuthKey(R-S2 || PSK2 || PK_E || PK_R) */
1466 addr[0] = wps->snonce + WPS_SECRET_NONCE_LEN;
1467 addr[1] = wps->psk2;
1468 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
1469 wpa_hexdump(MSG_DEBUG, "WPS: R-Hash2", hash, SHA256_MAC_LEN);
1470
1471 return 0;
1472 }
1473
1474
wps_build_r_snonce1(struct wps_data * wps,struct wpabuf * msg)1475 static int wps_build_r_snonce1(struct wps_data *wps, struct wpabuf *msg)
1476 {
1477 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce1");
1478 wpabuf_put_be16(msg, ATTR_R_SNONCE1);
1479 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1480 wpabuf_put_data(msg, wps->snonce, WPS_SECRET_NONCE_LEN);
1481 return 0;
1482 }
1483
1484
wps_build_r_snonce2(struct wps_data * wps,struct wpabuf * msg)1485 static int wps_build_r_snonce2(struct wps_data *wps, struct wpabuf *msg)
1486 {
1487 wpa_printf(MSG_DEBUG, "WPS: * R-SNonce2");
1488 wpabuf_put_be16(msg, ATTR_R_SNONCE2);
1489 wpabuf_put_be16(msg, WPS_SECRET_NONCE_LEN);
1490 wpabuf_put_data(msg, wps->snonce + WPS_SECRET_NONCE_LEN,
1491 WPS_SECRET_NONCE_LEN);
1492 return 0;
1493 }
1494
1495
wps_build_cred_network_idx(struct wpabuf * msg,const struct wps_credential * cred)1496 static int wps_build_cred_network_idx(struct wpabuf *msg,
1497 const struct wps_credential *cred)
1498 {
1499 wpa_printf(MSG_DEBUG, "WPS: * Network Index (1)");
1500 wpabuf_put_be16(msg, ATTR_NETWORK_INDEX);
1501 wpabuf_put_be16(msg, 1);
1502 wpabuf_put_u8(msg, 1);
1503 return 0;
1504 }
1505
1506
wps_build_cred_ssid(struct wpabuf * msg,const struct wps_credential * cred)1507 static int wps_build_cred_ssid(struct wpabuf *msg,
1508 const struct wps_credential *cred)
1509 {
1510 wpa_printf(MSG_DEBUG, "WPS: * SSID");
1511 wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID for Credential",
1512 cred->ssid, cred->ssid_len);
1513 wpabuf_put_be16(msg, ATTR_SSID);
1514 wpabuf_put_be16(msg, cred->ssid_len);
1515 wpabuf_put_data(msg, cred->ssid, cred->ssid_len);
1516 return 0;
1517 }
1518
1519
wps_build_cred_auth_type(struct wpabuf * msg,const struct wps_credential * cred)1520 static int wps_build_cred_auth_type(struct wpabuf *msg,
1521 const struct wps_credential *cred)
1522 {
1523 wpa_printf(MSG_DEBUG, "WPS: * Authentication Type (0x%x)",
1524 cred->auth_type);
1525 wpabuf_put_be16(msg, ATTR_AUTH_TYPE);
1526 wpabuf_put_be16(msg, 2);
1527 wpabuf_put_be16(msg, cred->auth_type);
1528 return 0;
1529 }
1530
1531
wps_build_cred_encr_type(struct wpabuf * msg,const struct wps_credential * cred)1532 static int wps_build_cred_encr_type(struct wpabuf *msg,
1533 const struct wps_credential *cred)
1534 {
1535 wpa_printf(MSG_DEBUG, "WPS: * Encryption Type (0x%x)",
1536 cred->encr_type);
1537 wpabuf_put_be16(msg, ATTR_ENCR_TYPE);
1538 wpabuf_put_be16(msg, 2);
1539 wpabuf_put_be16(msg, cred->encr_type);
1540 return 0;
1541 }
1542
1543
wps_build_cred_network_key(struct wpabuf * msg,const struct wps_credential * cred)1544 static int wps_build_cred_network_key(struct wpabuf *msg,
1545 const struct wps_credential *cred)
1546 {
1547 wpa_printf(MSG_DEBUG, "WPS: * Network Key (len=%d)",
1548 (int) cred->key_len);
1549 wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
1550 cred->key, cred->key_len);
1551 wpabuf_put_be16(msg, ATTR_NETWORK_KEY);
1552 wpabuf_put_be16(msg, cred->key_len);
1553 wpabuf_put_data(msg, cred->key, cred->key_len);
1554 return 0;
1555 }
1556
1557
wps_build_credential(struct wpabuf * msg,const struct wps_credential * cred)1558 static int wps_build_credential(struct wpabuf *msg,
1559 const struct wps_credential *cred)
1560 {
1561 if (wps_build_cred_network_idx(msg, cred) ||
1562 wps_build_cred_ssid(msg, cred) ||
1563 wps_build_cred_auth_type(msg, cred) ||
1564 wps_build_cred_encr_type(msg, cred) ||
1565 wps_build_cred_network_key(msg, cred) ||
1566 wps_build_mac_addr(msg, cred->mac_addr))
1567 return -1;
1568 return 0;
1569 }
1570
1571
wps_build_credential_wrap(struct wpabuf * msg,const struct wps_credential * cred)1572 int wps_build_credential_wrap(struct wpabuf *msg,
1573 const struct wps_credential *cred)
1574 {
1575 struct wpabuf *wbuf;
1576 wbuf = wpabuf_alloc(200);
1577 if (wbuf == NULL)
1578 return -1;
1579 if (wps_build_credential(wbuf, cred)) {
1580 wpabuf_free(wbuf);
1581 return -1;
1582 }
1583 wpabuf_put_be16(msg, ATTR_CRED);
1584 wpabuf_put_be16(msg, wpabuf_len(wbuf));
1585 wpabuf_put_buf(msg, wbuf);
1586 wpabuf_free(wbuf);
1587 return 0;
1588 }
1589
1590
wps_build_cred(struct wps_data * wps,struct wpabuf * msg)1591 int wps_build_cred(struct wps_data *wps, struct wpabuf *msg)
1592 {
1593 struct wpabuf *cred;
1594
1595 if (wps->wps->registrar->skip_cred_build)
1596 goto skip_cred_build;
1597
1598 wpa_printf(MSG_DEBUG, "WPS: * Credential");
1599 if (wps->use_cred) {
1600 os_memcpy(&wps->cred, wps->use_cred, sizeof(wps->cred));
1601 goto use_provided;
1602 }
1603 os_memset(&wps->cred, 0, sizeof(wps->cred));
1604
1605 os_memcpy(wps->cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
1606 wps->cred.ssid_len = wps->wps->ssid_len;
1607
1608 /* Select the best authentication and encryption type */
1609 wpa_printf(MSG_DEBUG,
1610 "WPS: Own auth types 0x%x - masked Enrollee auth types 0x%x",
1611 wps->wps->auth_types, wps->auth_type);
1612 if (wps->auth_type & WPS_AUTH_WPA2PSK)
1613 wps->auth_type = WPS_AUTH_WPA2PSK;
1614 else if (wps->auth_type & WPS_AUTH_WPAPSK)
1615 wps->auth_type = WPS_AUTH_WPAPSK;
1616 else if (wps->auth_type & WPS_AUTH_OPEN)
1617 wps->auth_type = WPS_AUTH_OPEN;
1618 else {
1619 wpa_printf(MSG_DEBUG, "WPS: Unsupported auth_type 0x%x",
1620 wps->auth_type);
1621 return -1;
1622 }
1623 wps->cred.auth_type = wps->auth_type;
1624
1625 wpa_printf(MSG_DEBUG,
1626 "WPS: Own encr types 0x%x (rsn: 0x%x, wpa: 0x%x) - masked Enrollee encr types 0x%x",
1627 wps->wps->encr_types, wps->wps->encr_types_rsn,
1628 wps->wps->encr_types_wpa, wps->encr_type);
1629 if (wps->wps->ap && wps->auth_type == WPS_AUTH_WPA2PSK)
1630 wps->encr_type &= wps->wps->encr_types_rsn;
1631 else if (wps->wps->ap && wps->auth_type == WPS_AUTH_WPAPSK)
1632 wps->encr_type &= wps->wps->encr_types_wpa;
1633 if (wps->auth_type == WPS_AUTH_WPA2PSK ||
1634 wps->auth_type == WPS_AUTH_WPAPSK) {
1635 if (wps->encr_type & WPS_ENCR_AES)
1636 wps->encr_type = WPS_ENCR_AES;
1637 else if (wps->encr_type & WPS_ENCR_TKIP)
1638 wps->encr_type = WPS_ENCR_TKIP;
1639 else {
1640 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1641 "type for WPA/WPA2");
1642 return -1;
1643 }
1644 } else {
1645 if (wps->encr_type & WPS_ENCR_NONE)
1646 wps->encr_type = WPS_ENCR_NONE;
1647 #ifdef CONFIG_TESTING_OPTIONS
1648 else if (wps->encr_type & WPS_ENCR_WEP)
1649 wps->encr_type = WPS_ENCR_WEP;
1650 #endif /* CONFIG_TESTING_OPTIONS */
1651 else {
1652 wpa_printf(MSG_DEBUG, "WPS: No suitable encryption "
1653 "type for non-WPA/WPA2 mode");
1654 return -1;
1655 }
1656 }
1657 wps->cred.encr_type = wps->encr_type;
1658 /*
1659 * Set MAC address in the Credential to be the Enrollee's MAC address
1660 */
1661 os_memcpy(wps->cred.mac_addr, wps->mac_addr_e, ETH_ALEN);
1662
1663 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->wps->ap &&
1664 !wps->wps->registrar->disable_auto_conf) {
1665 u8 r[16];
1666 /* Generate a random passphrase */
1667 if (random_pool_ready() != 1 ||
1668 random_get_bytes(r, sizeof(r)) < 0) {
1669 wpa_printf(MSG_INFO,
1670 "WPS: Could not generate random PSK");
1671 return -1;
1672 }
1673 os_free(wps->new_psk);
1674 wps->new_psk = base64_encode(r, sizeof(r), &wps->new_psk_len);
1675 if (wps->new_psk == NULL)
1676 return -1;
1677 wps->new_psk_len--; /* remove newline */
1678 while (wps->new_psk_len &&
1679 wps->new_psk[wps->new_psk_len - 1] == '=')
1680 wps->new_psk_len--;
1681 wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Generated passphrase",
1682 wps->new_psk, wps->new_psk_len);
1683 os_memcpy(wps->cred.key, wps->new_psk, wps->new_psk_len);
1684 wps->cred.key_len = wps->new_psk_len;
1685 } else if (!wps->wps->registrar->force_per_enrollee_psk &&
1686 wps->use_psk_key && wps->wps->psk_set) {
1687 char hex[65];
1688 wpa_printf(MSG_DEBUG, "WPS: Use PSK format for Network Key");
1689 wpa_snprintf_hex(hex, sizeof(hex), wps->wps->psk, 32);
1690 os_memcpy(wps->cred.key, hex, 32 * 2);
1691 wps->cred.key_len = 32 * 2;
1692 } else if (!wps->wps->registrar->force_per_enrollee_psk &&
1693 wps->wps->network_key) {
1694 os_memcpy(wps->cred.key, wps->wps->network_key,
1695 wps->wps->network_key_len);
1696 wps->cred.key_len = wps->wps->network_key_len;
1697 } else if (wps->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) {
1698 char hex[65];
1699 /* Generate a random per-device PSK */
1700 os_free(wps->new_psk);
1701 wps->new_psk_len = 32;
1702 wps->new_psk = os_malloc(wps->new_psk_len);
1703 if (wps->new_psk == NULL)
1704 return -1;
1705 if (random_pool_ready() != 1 ||
1706 random_get_bytes(wps->new_psk, wps->new_psk_len) < 0) {
1707 wpa_printf(MSG_INFO,
1708 "WPS: Could not generate random PSK");
1709 os_free(wps->new_psk);
1710 wps->new_psk = NULL;
1711 return -1;
1712 }
1713 wpa_hexdump_key(MSG_DEBUG, "WPS: Generated per-device PSK",
1714 wps->new_psk, wps->new_psk_len);
1715 wpa_snprintf_hex(hex, sizeof(hex), wps->new_psk,
1716 wps->new_psk_len);
1717 os_memcpy(wps->cred.key, hex, wps->new_psk_len * 2);
1718 wps->cred.key_len = wps->new_psk_len * 2;
1719 }
1720
1721 use_provided:
1722 #ifdef CONFIG_WPS_TESTING
1723 if (wps_testing_dummy_cred)
1724 cred = wpabuf_alloc(200);
1725 else
1726 cred = NULL;
1727 if (cred) {
1728 struct wps_credential dummy;
1729 wpa_printf(MSG_DEBUG, "WPS: Add dummy credential");
1730 os_memset(&dummy, 0, sizeof(dummy));
1731 os_memcpy(dummy.ssid, "dummy", 5);
1732 dummy.ssid_len = 5;
1733 dummy.auth_type = WPS_AUTH_WPA2PSK;
1734 dummy.encr_type = WPS_ENCR_AES;
1735 os_memcpy(dummy.key, "dummy psk", 9);
1736 dummy.key_len = 9;
1737 os_memcpy(dummy.mac_addr, wps->mac_addr_e, ETH_ALEN);
1738 wps_build_credential(cred, &dummy);
1739 wpa_hexdump_buf(MSG_DEBUG, "WPS: Dummy Credential", cred);
1740
1741 wpabuf_put_be16(msg, ATTR_CRED);
1742 wpabuf_put_be16(msg, wpabuf_len(cred));
1743 wpabuf_put_buf(msg, cred);
1744
1745 wpabuf_free(cred);
1746 }
1747 #endif /* CONFIG_WPS_TESTING */
1748
1749 cred = wpabuf_alloc(200);
1750 if (cred == NULL)
1751 return -1;
1752
1753 if (wps_build_credential(cred, &wps->cred)) {
1754 wpabuf_free(cred);
1755 return -1;
1756 }
1757
1758 wpabuf_put_be16(msg, ATTR_CRED);
1759 wpabuf_put_be16(msg, wpabuf_len(cred));
1760 wpabuf_put_buf(msg, cred);
1761 wpabuf_free(cred);
1762
1763 skip_cred_build:
1764 if (wps->wps->registrar->extra_cred) {
1765 wpa_printf(MSG_DEBUG, "WPS: * Credential (pre-configured)");
1766 wpabuf_put_buf(msg, wps->wps->registrar->extra_cred);
1767 }
1768
1769 return 0;
1770 }
1771
1772
wps_build_ap_settings(struct wps_data * wps,struct wpabuf * msg)1773 static int wps_build_ap_settings(struct wps_data *wps, struct wpabuf *msg)
1774 {
1775 wpa_printf(MSG_DEBUG, "WPS: * AP Settings");
1776
1777 if (wps_build_credential(msg, &wps->cred))
1778 return -1;
1779
1780 return 0;
1781 }
1782
1783
wps_build_ap_cred(struct wps_data * wps)1784 static struct wpabuf * wps_build_ap_cred(struct wps_data *wps)
1785 {
1786 struct wpabuf *msg, *plain;
1787
1788 msg = wpabuf_alloc(1000);
1789 if (msg == NULL)
1790 return NULL;
1791
1792 plain = wpabuf_alloc(200);
1793 if (plain == NULL) {
1794 wpabuf_free(msg);
1795 return NULL;
1796 }
1797
1798 if (wps_build_ap_settings(wps, plain)) {
1799 wpabuf_free(plain);
1800 wpabuf_free(msg);
1801 return NULL;
1802 }
1803
1804 wpabuf_put_be16(msg, ATTR_CRED);
1805 wpabuf_put_be16(msg, wpabuf_len(plain));
1806 wpabuf_put_buf(msg, plain);
1807 wpabuf_free(plain);
1808
1809 return msg;
1810 }
1811
1812
wps_build_m2(struct wps_data * wps)1813 static struct wpabuf * wps_build_m2(struct wps_data *wps)
1814 {
1815 struct wpabuf *msg;
1816 int config_in_m2 = 0;
1817
1818 if (random_get_bytes(wps->nonce_r, WPS_NONCE_LEN) < 0)
1819 return NULL;
1820 wpa_hexdump(MSG_DEBUG, "WPS: Registrar Nonce",
1821 wps->nonce_r, WPS_NONCE_LEN);
1822 wpa_hexdump(MSG_DEBUG, "WPS: UUID-R", wps->uuid_r, WPS_UUID_LEN);
1823
1824 wpa_printf(MSG_DEBUG, "WPS: Building Message M2");
1825 msg = wpabuf_alloc(1000);
1826 if (msg == NULL)
1827 return NULL;
1828
1829 if (wps_build_version(msg) ||
1830 wps_build_msg_type(msg, WPS_M2) ||
1831 wps_build_enrollee_nonce(wps, msg) ||
1832 wps_build_registrar_nonce(wps, msg) ||
1833 wps_build_uuid_r(wps, msg) ||
1834 wps_build_public_key(wps, msg) ||
1835 wps_derive_keys(wps) ||
1836 wps_build_auth_type_flags(wps, msg) ||
1837 wps_build_encr_type_flags(wps, msg) ||
1838 wps_build_conn_type_flags(wps, msg) ||
1839 wps_build_config_methods_r(wps->wps->registrar, msg) ||
1840 wps_build_device_attrs(&wps->wps->dev, msg) ||
1841 wps_build_rf_bands(&wps->wps->dev, msg,
1842 wps->wps->rf_band_cb(wps->wps->cb_ctx)) ||
1843 wps_build_assoc_state(wps, msg) ||
1844 wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
1845 wps_build_dev_password_id(msg, wps->dev_pw_id) ||
1846 wps_build_os_version(&wps->wps->dev, msg) ||
1847 wps_build_wfa_ext(msg, 0, NULL, 0)) {
1848 wpabuf_free(msg);
1849 return NULL;
1850 }
1851
1852 #ifdef CONFIG_WPS_NFC
1853 if (wps->nfc_pw_token && wps->nfc_pw_token->pk_hash_provided_oob &&
1854 wps->nfc_pw_token->pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) {
1855 /*
1856 * Use abbreviated handshake since public key hash allowed
1857 * Enrollee to validate our public key similarly to how Enrollee
1858 * public key was validated. There is no need to validate Device
1859 * Password in this case.
1860 */
1861 struct wpabuf *plain = wpabuf_alloc(500);
1862 if (plain == NULL ||
1863 wps_build_cred(wps, plain) ||
1864 wps_build_key_wrap_auth(wps, plain) ||
1865 wps_build_encr_settings(wps, msg, plain)) {
1866 wpabuf_free(msg);
1867 wpabuf_free(plain);
1868 return NULL;
1869 }
1870 wpabuf_free(plain);
1871 config_in_m2 = 1;
1872 }
1873 #endif /* CONFIG_WPS_NFC */
1874
1875 if (wps_build_authenticator(wps, msg)) {
1876 wpabuf_free(msg);
1877 return NULL;
1878 }
1879
1880 wps->int_reg = 1;
1881 wps->state = config_in_m2 ? RECV_DONE : RECV_M3;
1882 return msg;
1883 }
1884
1885
wps_build_m2d(struct wps_data * wps)1886 static struct wpabuf * wps_build_m2d(struct wps_data *wps)
1887 {
1888 struct wpabuf *msg;
1889 u16 err = wps->config_error;
1890
1891 wpa_printf(MSG_DEBUG, "WPS: Building Message M2D");
1892 msg = wpabuf_alloc(1000);
1893 if (msg == NULL)
1894 return NULL;
1895
1896 if (wps->wps->ap && wps->wps->ap_setup_locked &&
1897 err == WPS_CFG_NO_ERROR)
1898 err = WPS_CFG_SETUP_LOCKED;
1899
1900 if (wps_build_version(msg) ||
1901 wps_build_msg_type(msg, WPS_M2D) ||
1902 wps_build_enrollee_nonce(wps, msg) ||
1903 wps_build_registrar_nonce(wps, msg) ||
1904 wps_build_uuid_r(wps, msg) ||
1905 wps_build_auth_type_flags(wps, msg) ||
1906 wps_build_encr_type_flags(wps, msg) ||
1907 wps_build_conn_type_flags(wps, msg) ||
1908 wps_build_config_methods_r(wps->wps->registrar, msg) ||
1909 wps_build_device_attrs(&wps->wps->dev, msg) ||
1910 wps_build_rf_bands(&wps->wps->dev, msg,
1911 wps->wps->rf_band_cb(wps->wps->cb_ctx)) ||
1912 wps_build_assoc_state(wps, msg) ||
1913 wps_build_config_error(msg, err) ||
1914 wps_build_os_version(&wps->wps->dev, msg) ||
1915 wps_build_wfa_ext(msg, 0, NULL, 0)) {
1916 wpabuf_free(msg);
1917 return NULL;
1918 }
1919
1920 wps->state = RECV_M2D_ACK;
1921 return msg;
1922 }
1923
1924
wps_build_m4(struct wps_data * wps)1925 static struct wpabuf * wps_build_m4(struct wps_data *wps)
1926 {
1927 struct wpabuf *msg, *plain;
1928
1929 wpa_printf(MSG_DEBUG, "WPS: Building Message M4");
1930
1931 wps_derive_psk(wps, wps->dev_password, wps->dev_password_len);
1932
1933 plain = wpabuf_alloc(200);
1934 if (plain == NULL)
1935 return NULL;
1936
1937 msg = wpabuf_alloc(1000);
1938 if (msg == NULL) {
1939 wpabuf_free(plain);
1940 return NULL;
1941 }
1942
1943 if (wps_build_version(msg) ||
1944 wps_build_msg_type(msg, WPS_M4) ||
1945 wps_build_enrollee_nonce(wps, msg) ||
1946 wps_build_r_hash(wps, msg) ||
1947 wps_build_r_snonce1(wps, plain) ||
1948 wps_build_key_wrap_auth(wps, plain) ||
1949 wps_build_encr_settings(wps, msg, plain) ||
1950 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1951 wps_build_authenticator(wps, msg)) {
1952 wpabuf_free(plain);
1953 wpabuf_free(msg);
1954 return NULL;
1955 }
1956 wpabuf_free(plain);
1957
1958 wps->state = RECV_M5;
1959 return msg;
1960 }
1961
1962
wps_build_m6(struct wps_data * wps)1963 static struct wpabuf * wps_build_m6(struct wps_data *wps)
1964 {
1965 struct wpabuf *msg, *plain;
1966
1967 wpa_printf(MSG_DEBUG, "WPS: Building Message M6");
1968
1969 plain = wpabuf_alloc(200);
1970 if (plain == NULL)
1971 return NULL;
1972
1973 msg = wpabuf_alloc(1000);
1974 if (msg == NULL) {
1975 wpabuf_free(plain);
1976 return NULL;
1977 }
1978
1979 if (wps_build_version(msg) ||
1980 wps_build_msg_type(msg, WPS_M6) ||
1981 wps_build_enrollee_nonce(wps, msg) ||
1982 wps_build_r_snonce2(wps, plain) ||
1983 wps_build_key_wrap_auth(wps, plain) ||
1984 wps_build_encr_settings(wps, msg, plain) ||
1985 wps_build_wfa_ext(msg, 0, NULL, 0) ||
1986 wps_build_authenticator(wps, msg)) {
1987 wpabuf_free(plain);
1988 wpabuf_free(msg);
1989 return NULL;
1990 }
1991 wpabuf_free(plain);
1992
1993 wps->wps_pin_revealed = 1;
1994 wps->state = RECV_M7;
1995 return msg;
1996 }
1997
1998
wps_build_m8(struct wps_data * wps)1999 static struct wpabuf * wps_build_m8(struct wps_data *wps)
2000 {
2001 struct wpabuf *msg, *plain;
2002
2003 wpa_printf(MSG_DEBUG, "WPS: Building Message M8");
2004
2005 plain = wpabuf_alloc(500);
2006 if (plain == NULL)
2007 return NULL;
2008
2009 msg = wpabuf_alloc(1000);
2010 if (msg == NULL) {
2011 wpabuf_free(plain);
2012 return NULL;
2013 }
2014
2015 if (wps_build_version(msg) ||
2016 wps_build_msg_type(msg, WPS_M8) ||
2017 wps_build_enrollee_nonce(wps, msg) ||
2018 ((wps->wps->ap || wps->er) && wps_build_cred(wps, plain)) ||
2019 (!wps->wps->ap && !wps->er && wps_build_ap_settings(wps, plain)) ||
2020 wps_build_key_wrap_auth(wps, plain) ||
2021 wps_build_encr_settings(wps, msg, plain) ||
2022 wps_build_wfa_ext(msg, 0, NULL, 0) ||
2023 wps_build_authenticator(wps, msg)) {
2024 wpabuf_free(plain);
2025 wpabuf_free(msg);
2026 return NULL;
2027 }
2028 wpabuf_free(plain);
2029
2030 wps->state = RECV_DONE;
2031 return msg;
2032 }
2033
2034
wps_registrar_get_msg(struct wps_data * wps,enum wsc_op_code * op_code)2035 struct wpabuf * wps_registrar_get_msg(struct wps_data *wps,
2036 enum wsc_op_code *op_code)
2037 {
2038 struct wpabuf *msg;
2039
2040 #ifdef CONFIG_WPS_UPNP
2041 if (!wps->int_reg && wps->wps->wps_upnp) {
2042 struct upnp_pending_message *p, *prev = NULL;
2043 if (wps->ext_reg > 1)
2044 wps_registrar_free_pending_m2(wps->wps);
2045 p = wps->wps->upnp_msgs;
2046 /* TODO: check pending message MAC address */
2047 while (p && p->next) {
2048 prev = p;
2049 p = p->next;
2050 }
2051 if (p) {
2052 wpa_printf(MSG_DEBUG, "WPS: Use pending message from "
2053 "UPnP");
2054 if (prev)
2055 prev->next = NULL;
2056 else
2057 wps->wps->upnp_msgs = NULL;
2058 msg = p->msg;
2059 switch (p->type) {
2060 case WPS_WSC_ACK:
2061 *op_code = WSC_ACK;
2062 break;
2063 case WPS_WSC_NACK:
2064 *op_code = WSC_NACK;
2065 break;
2066 default:
2067 *op_code = WSC_MSG;
2068 break;
2069 }
2070 os_free(p);
2071 if (wps->ext_reg == 0)
2072 wps->ext_reg = 1;
2073 return msg;
2074 }
2075 }
2076 if (wps->ext_reg) {
2077 wpa_printf(MSG_DEBUG, "WPS: Using external Registrar, but no "
2078 "pending message available");
2079 return NULL;
2080 }
2081 #endif /* CONFIG_WPS_UPNP */
2082
2083 switch (wps->state) {
2084 case SEND_M2:
2085 if (wps_get_dev_password(wps) < 0)
2086 msg = wps_build_m2d(wps);
2087 else
2088 msg = wps_build_m2(wps);
2089 *op_code = WSC_MSG;
2090 break;
2091 case SEND_M2D:
2092 msg = wps_build_m2d(wps);
2093 *op_code = WSC_MSG;
2094 break;
2095 case SEND_M4:
2096 msg = wps_build_m4(wps);
2097 *op_code = WSC_MSG;
2098 break;
2099 case SEND_M6:
2100 msg = wps_build_m6(wps);
2101 *op_code = WSC_MSG;
2102 break;
2103 case SEND_M8:
2104 msg = wps_build_m8(wps);
2105 *op_code = WSC_MSG;
2106 break;
2107 case RECV_DONE:
2108 msg = wps_build_wsc_ack(wps);
2109 *op_code = WSC_ACK;
2110 break;
2111 case SEND_WSC_NACK:
2112 msg = wps_build_wsc_nack(wps);
2113 *op_code = WSC_NACK;
2114 break;
2115 default:
2116 wpa_printf(MSG_DEBUG, "WPS: Unsupported state %d for building "
2117 "a message", wps->state);
2118 msg = NULL;
2119 break;
2120 }
2121
2122 if (*op_code == WSC_MSG && msg) {
2123 /* Save a copy of the last message for Authenticator derivation
2124 */
2125 wpabuf_free(wps->last_msg);
2126 wps->last_msg = wpabuf_dup(msg);
2127 }
2128
2129 return msg;
2130 }
2131
2132
wps_process_enrollee_nonce(struct wps_data * wps,const u8 * e_nonce)2133 static int wps_process_enrollee_nonce(struct wps_data *wps, const u8 *e_nonce)
2134 {
2135 if (e_nonce == NULL) {
2136 wpa_printf(MSG_DEBUG, "WPS: No Enrollee Nonce received");
2137 return -1;
2138 }
2139
2140 os_memcpy(wps->nonce_e, e_nonce, WPS_NONCE_LEN);
2141 wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
2142 wps->nonce_e, WPS_NONCE_LEN);
2143
2144 return 0;
2145 }
2146
2147
wps_process_registrar_nonce(struct wps_data * wps,const u8 * r_nonce)2148 static int wps_process_registrar_nonce(struct wps_data *wps, const u8 *r_nonce)
2149 {
2150 if (r_nonce == NULL) {
2151 wpa_printf(MSG_DEBUG, "WPS: No Registrar Nonce received");
2152 return -1;
2153 }
2154
2155 if (os_memcmp(wps->nonce_r, r_nonce, WPS_NONCE_LEN) != 0) {
2156 wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce received");
2157 return -1;
2158 }
2159
2160 return 0;
2161 }
2162
2163
wps_process_uuid_e(struct wps_data * wps,const u8 * uuid_e)2164 static int wps_process_uuid_e(struct wps_data *wps, const u8 *uuid_e)
2165 {
2166 if (uuid_e == NULL) {
2167 wpa_printf(MSG_DEBUG, "WPS: No UUID-E received");
2168 return -1;
2169 }
2170
2171 os_memcpy(wps->uuid_e, uuid_e, WPS_UUID_LEN);
2172 wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", wps->uuid_e, WPS_UUID_LEN);
2173
2174 return 0;
2175 }
2176
2177
wps_process_dev_password_id(struct wps_data * wps,const u8 * pw_id)2178 static int wps_process_dev_password_id(struct wps_data *wps, const u8 *pw_id)
2179 {
2180 if (pw_id == NULL) {
2181 wpa_printf(MSG_DEBUG, "WPS: No Device Password ID received");
2182 return -1;
2183 }
2184
2185 wps->dev_pw_id = WPA_GET_BE16(pw_id);
2186 wpa_printf(MSG_DEBUG, "WPS: Device Password ID %d", wps->dev_pw_id);
2187
2188 return 0;
2189 }
2190
2191
wps_process_e_hash1(struct wps_data * wps,const u8 * e_hash1)2192 static int wps_process_e_hash1(struct wps_data *wps, const u8 *e_hash1)
2193 {
2194 if (e_hash1 == NULL) {
2195 wpa_printf(MSG_DEBUG, "WPS: No E-Hash1 received");
2196 return -1;
2197 }
2198
2199 os_memcpy(wps->peer_hash1, e_hash1, WPS_HASH_LEN);
2200 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash1", wps->peer_hash1, WPS_HASH_LEN);
2201
2202 return 0;
2203 }
2204
2205
wps_process_e_hash2(struct wps_data * wps,const u8 * e_hash2)2206 static int wps_process_e_hash2(struct wps_data *wps, const u8 *e_hash2)
2207 {
2208 if (e_hash2 == NULL) {
2209 wpa_printf(MSG_DEBUG, "WPS: No E-Hash2 received");
2210 return -1;
2211 }
2212
2213 os_memcpy(wps->peer_hash2, e_hash2, WPS_HASH_LEN);
2214 wpa_hexdump(MSG_DEBUG, "WPS: E-Hash2", wps->peer_hash2, WPS_HASH_LEN);
2215
2216 return 0;
2217 }
2218
2219
wps_process_e_snonce1(struct wps_data * wps,const u8 * e_snonce1)2220 static int wps_process_e_snonce1(struct wps_data *wps, const u8 *e_snonce1)
2221 {
2222 u8 hash[SHA256_MAC_LEN];
2223 const u8 *addr[4];
2224 size_t len[4];
2225
2226 if (e_snonce1 == NULL) {
2227 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce1 received");
2228 return -1;
2229 }
2230
2231 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce1", e_snonce1,
2232 WPS_SECRET_NONCE_LEN);
2233
2234 /* E-Hash1 = HMAC_AuthKey(E-S1 || PSK1 || PK_E || PK_R) */
2235 addr[0] = e_snonce1;
2236 len[0] = WPS_SECRET_NONCE_LEN;
2237 addr[1] = wps->psk1;
2238 len[1] = WPS_PSK_LEN;
2239 addr[2] = wpabuf_head(wps->dh_pubkey_e);
2240 len[2] = wpabuf_len(wps->dh_pubkey_e);
2241 addr[3] = wpabuf_head(wps->dh_pubkey_r);
2242 len[3] = wpabuf_len(wps->dh_pubkey_r);
2243 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2244
2245 if (os_memcmp_const(wps->peer_hash1, hash, WPS_HASH_LEN) != 0) {
2246 wpa_printf(MSG_DEBUG, "WPS: E-Hash1 derived from E-S1 does "
2247 "not match with the pre-committed value");
2248 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2249 wps_pwd_auth_fail_event(wps->wps, 0, 1, wps->mac_addr_e);
2250 return -1;
2251 }
2252
2253 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the first "
2254 "half of the device password");
2255
2256 return 0;
2257 }
2258
2259
wps_process_e_snonce2(struct wps_data * wps,const u8 * e_snonce2)2260 static int wps_process_e_snonce2(struct wps_data *wps, const u8 *e_snonce2)
2261 {
2262 u8 hash[SHA256_MAC_LEN];
2263 const u8 *addr[4];
2264 size_t len[4];
2265
2266 if (e_snonce2 == NULL) {
2267 wpa_printf(MSG_DEBUG, "WPS: No E-SNonce2 received");
2268 return -1;
2269 }
2270
2271 wpa_hexdump_key(MSG_DEBUG, "WPS: E-SNonce2", e_snonce2,
2272 WPS_SECRET_NONCE_LEN);
2273
2274 /* E-Hash2 = HMAC_AuthKey(E-S2 || PSK2 || PK_E || PK_R) */
2275 addr[0] = e_snonce2;
2276 len[0] = WPS_SECRET_NONCE_LEN;
2277 addr[1] = wps->psk2;
2278 len[1] = WPS_PSK_LEN;
2279 addr[2] = wpabuf_head(wps->dh_pubkey_e);
2280 len[2] = wpabuf_len(wps->dh_pubkey_e);
2281 addr[3] = wpabuf_head(wps->dh_pubkey_r);
2282 len[3] = wpabuf_len(wps->dh_pubkey_r);
2283 hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 4, addr, len, hash);
2284
2285 if (os_memcmp_const(wps->peer_hash2, hash, WPS_HASH_LEN) != 0) {
2286 wpa_printf(MSG_DEBUG, "WPS: E-Hash2 derived from E-S2 does "
2287 "not match with the pre-committed value");
2288 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2289 wps->config_error = WPS_CFG_DEV_PASSWORD_AUTH_FAILURE;
2290 wps_pwd_auth_fail_event(wps->wps, 0, 2, wps->mac_addr_e);
2291 return -1;
2292 }
2293
2294 wpa_printf(MSG_DEBUG, "WPS: Enrollee proved knowledge of the second "
2295 "half of the device password");
2296 wps->wps_pin_revealed = 0;
2297 wps_registrar_unlock_pin(wps->wps->registrar, wps->uuid_e);
2298
2299 /*
2300 * In case wildcard PIN is used and WPS handshake succeeds in the first
2301 * attempt, wps_registrar_unlock_pin() would not free the PIN, so make
2302 * sure the PIN gets invalidated here.
2303 */
2304 wps_registrar_invalidate_pin(wps->wps->registrar, wps->uuid_e);
2305
2306 return 0;
2307 }
2308
2309
wps_process_mac_addr(struct wps_data * wps,const u8 * mac_addr)2310 static int wps_process_mac_addr(struct wps_data *wps, const u8 *mac_addr)
2311 {
2312 if (mac_addr == NULL) {
2313 wpa_printf(MSG_DEBUG, "WPS: No MAC Address received");
2314 return -1;
2315 }
2316
2317 wpa_printf(MSG_DEBUG, "WPS: Enrollee MAC Address " MACSTR,
2318 MAC2STR(mac_addr));
2319 os_memcpy(wps->mac_addr_e, mac_addr, ETH_ALEN);
2320 os_memcpy(wps->peer_dev.mac_addr, mac_addr, ETH_ALEN);
2321
2322 return 0;
2323 }
2324
2325
wps_process_pubkey(struct wps_data * wps,const u8 * pk,size_t pk_len)2326 static int wps_process_pubkey(struct wps_data *wps, const u8 *pk,
2327 size_t pk_len)
2328 {
2329 if (pk == NULL || pk_len == 0) {
2330 wpa_printf(MSG_DEBUG, "WPS: No Public Key received");
2331 return -1;
2332 }
2333
2334 wpabuf_free(wps->dh_pubkey_e);
2335 wps->dh_pubkey_e = wpabuf_alloc_copy(pk, pk_len);
2336 if (wps->dh_pubkey_e == NULL)
2337 return -1;
2338
2339 return 0;
2340 }
2341
2342
wps_process_auth_type_flags(struct wps_data * wps,const u8 * auth)2343 static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
2344 {
2345 u16 auth_types;
2346
2347 if (auth == NULL) {
2348 wpa_printf(MSG_DEBUG, "WPS: No Authentication Type flags "
2349 "received");
2350 return -1;
2351 }
2352
2353 auth_types = WPA_GET_BE16(auth);
2354
2355 wpa_printf(MSG_DEBUG, "WPS: Enrollee Authentication Type flags 0x%x",
2356 auth_types);
2357 #ifdef WPS_WORKAROUNDS
2358 /*
2359 * Some deployed implementations seem to advertise incorrect information
2360 * in this attribute. A value of 0x1b (WPA2 + WPA + WPAPSK + OPEN, but
2361 * no WPA2PSK) has been reported to be used. Add WPA2PSK to the list to
2362 * avoid issues with building Credentials that do not use the strongest
2363 * actually supported authentication option (that device does support
2364 * WPA2PSK even when it does not claim it here).
2365 */
2366 if ((auth_types &
2367 (WPS_AUTH_WPA2 | WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK)) ==
2368 (WPS_AUTH_WPA2 | WPS_AUTH_WPAPSK)) {
2369 wpa_printf(MSG_DEBUG,
2370 "WPS: Workaround - assume Enrollee supports WPA2PSK based on claimed WPA2 support");
2371 auth_types |= WPS_AUTH_WPA2PSK;
2372 }
2373 #endif /* WPS_WORKAROUNDS */
2374 wps->auth_type = wps->wps->auth_types & auth_types;
2375 if (wps->auth_type == 0) {
2376 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2377 "authentication types (own 0x%x Enrollee 0x%x)",
2378 wps->wps->auth_types, auth_types);
2379 #ifdef WPS_WORKAROUNDS
2380 /*
2381 * Some deployed implementations seem to advertise incorrect
2382 * information in this attribute. For example, Linksys WRT350N
2383 * seems to have a byteorder bug that breaks this negotiation.
2384 * In order to interoperate with existing implementations,
2385 * assume that the Enrollee supports everything we do.
2386 */
2387 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2388 "does not advertise supported authentication types "
2389 "correctly");
2390 wps->auth_type = wps->wps->auth_types;
2391 #else /* WPS_WORKAROUNDS */
2392 return -1;
2393 #endif /* WPS_WORKAROUNDS */
2394 }
2395
2396 return 0;
2397 }
2398
2399
wps_process_encr_type_flags(struct wps_data * wps,const u8 * encr)2400 static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
2401 {
2402 u16 encr_types;
2403
2404 if (encr == NULL) {
2405 wpa_printf(MSG_DEBUG, "WPS: No Encryption Type flags "
2406 "received");
2407 return -1;
2408 }
2409
2410 encr_types = WPA_GET_BE16(encr);
2411
2412 wpa_printf(MSG_DEBUG, "WPS: Enrollee Encryption Type flags 0x%x",
2413 encr_types);
2414 wps->encr_type = wps->wps->encr_types & encr_types;
2415 if (wps->encr_type == 0) {
2416 wpa_printf(MSG_DEBUG, "WPS: No match in supported "
2417 "encryption types (own 0x%x Enrollee 0x%x)",
2418 wps->wps->encr_types, encr_types);
2419 #ifdef WPS_WORKAROUNDS
2420 /*
2421 * Some deployed implementations seem to advertise incorrect
2422 * information in this attribute. For example, Linksys WRT350N
2423 * seems to have a byteorder bug that breaks this negotiation.
2424 * In order to interoperate with existing implementations,
2425 * assume that the Enrollee supports everything we do.
2426 */
2427 wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
2428 "does not advertise supported encryption types "
2429 "correctly");
2430 wps->encr_type = wps->wps->encr_types;
2431 #else /* WPS_WORKAROUNDS */
2432 return -1;
2433 #endif /* WPS_WORKAROUNDS */
2434 }
2435
2436 return 0;
2437 }
2438
2439
wps_process_conn_type_flags(struct wps_data * wps,const u8 * conn)2440 static int wps_process_conn_type_flags(struct wps_data *wps, const u8 *conn)
2441 {
2442 if (conn == NULL) {
2443 wpa_printf(MSG_DEBUG, "WPS: No Connection Type flags "
2444 "received");
2445 return -1;
2446 }
2447
2448 wpa_printf(MSG_DEBUG, "WPS: Enrollee Connection Type flags 0x%x",
2449 *conn);
2450
2451 return 0;
2452 }
2453
2454
wps_process_config_methods(struct wps_data * wps,const u8 * methods)2455 static int wps_process_config_methods(struct wps_data *wps, const u8 *methods)
2456 {
2457 u16 m;
2458
2459 if (methods == NULL) {
2460 wpa_printf(MSG_DEBUG, "WPS: No Config Methods received");
2461 return -1;
2462 }
2463
2464 m = WPA_GET_BE16(methods);
2465
2466 wpa_printf(MSG_DEBUG, "WPS: Enrollee Config Methods 0x%x"
2467 "%s%s%s%s%s%s%s%s%s", m,
2468 m & WPS_CONFIG_USBA ? " [USBA]" : "",
2469 m & WPS_CONFIG_ETHERNET ? " [Ethernet]" : "",
2470 m & WPS_CONFIG_LABEL ? " [Label]" : "",
2471 m & WPS_CONFIG_DISPLAY ? " [Display]" : "",
2472 m & WPS_CONFIG_EXT_NFC_TOKEN ? " [Ext NFC Token]" : "",
2473 m & WPS_CONFIG_INT_NFC_TOKEN ? " [Int NFC Token]" : "",
2474 m & WPS_CONFIG_NFC_INTERFACE ? " [NFC]" : "",
2475 m & WPS_CONFIG_PUSHBUTTON ? " [PBC]" : "",
2476 m & WPS_CONFIG_KEYPAD ? " [Keypad]" : "");
2477
2478 if (!(m & WPS_CONFIG_DISPLAY) && !wps->use_psk_key) {
2479 /*
2480 * The Enrollee does not have a display so it is unlikely to be
2481 * able to show the passphrase to a user and as such, could
2482 * benefit from receiving PSK to reduce key derivation time.
2483 */
2484 wpa_printf(MSG_DEBUG, "WPS: Prefer PSK format key due to "
2485 "Enrollee not supporting display");
2486 wps->use_psk_key = 1;
2487 }
2488
2489 return 0;
2490 }
2491
2492
wps_process_wps_state(struct wps_data * wps,const u8 * state)2493 static int wps_process_wps_state(struct wps_data *wps, const u8 *state)
2494 {
2495 if (state == NULL) {
2496 wpa_printf(MSG_DEBUG, "WPS: No Wi-Fi Protected Setup State "
2497 "received");
2498 return -1;
2499 }
2500
2501 wpa_printf(MSG_DEBUG, "WPS: Enrollee Wi-Fi Protected Setup State %d",
2502 *state);
2503
2504 return 0;
2505 }
2506
2507
wps_process_assoc_state(struct wps_data * wps,const u8 * assoc)2508 static int wps_process_assoc_state(struct wps_data *wps, const u8 *assoc)
2509 {
2510 u16 a;
2511
2512 if (assoc == NULL) {
2513 wpa_printf(MSG_DEBUG, "WPS: No Association State received");
2514 return -1;
2515 }
2516
2517 a = WPA_GET_BE16(assoc);
2518 wpa_printf(MSG_DEBUG, "WPS: Enrollee Association State %d", a);
2519
2520 return 0;
2521 }
2522
2523
wps_process_config_error(struct wps_data * wps,const u8 * err)2524 static int wps_process_config_error(struct wps_data *wps, const u8 *err)
2525 {
2526 u16 e;
2527
2528 if (err == NULL) {
2529 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error received");
2530 return -1;
2531 }
2532
2533 e = WPA_GET_BE16(err);
2534 wpa_printf(MSG_DEBUG, "WPS: Enrollee Configuration Error %d", e);
2535
2536 return 0;
2537 }
2538
2539
wps_registrar_p2p_dev_addr_match(struct wps_data * wps)2540 static int wps_registrar_p2p_dev_addr_match(struct wps_data *wps)
2541 {
2542 #ifdef CONFIG_P2P
2543 struct wps_registrar *reg = wps->wps->registrar;
2544
2545 if (is_zero_ether_addr(reg->p2p_dev_addr))
2546 return 1; /* no filtering in use */
2547
2548 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) != 0) {
2549 wpa_printf(MSG_DEBUG, "WPS: No match on P2P Device Address "
2550 "filtering for PBC: expected " MACSTR " was "
2551 MACSTR " - indicate PBC session overlap",
2552 MAC2STR(reg->p2p_dev_addr),
2553 MAC2STR(wps->p2p_dev_addr));
2554 return 0;
2555 }
2556 #endif /* CONFIG_P2P */
2557 return 1;
2558 }
2559
2560
wps_registrar_skip_overlap(struct wps_data * wps)2561 static int wps_registrar_skip_overlap(struct wps_data *wps)
2562 {
2563 #ifdef CONFIG_P2P
2564 struct wps_registrar *reg = wps->wps->registrar;
2565
2566 if (is_zero_ether_addr(reg->p2p_dev_addr))
2567 return 0; /* no specific Enrollee selected */
2568
2569 if (os_memcmp(reg->p2p_dev_addr, wps->p2p_dev_addr, ETH_ALEN) == 0) {
2570 wpa_printf(MSG_DEBUG, "WPS: Skip PBC overlap due to selected "
2571 "Enrollee match");
2572 return 1;
2573 }
2574 #endif /* CONFIG_P2P */
2575 return 0;
2576 }
2577
2578
wps_process_m1(struct wps_data * wps,struct wps_parse_attr * attr)2579 static enum wps_process_res wps_process_m1(struct wps_data *wps,
2580 struct wps_parse_attr *attr)
2581 {
2582 wpa_printf(MSG_DEBUG, "WPS: Received M1");
2583
2584 if (wps->state != RECV_M1) {
2585 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2586 "receiving M1", wps->state);
2587 return WPS_FAILURE;
2588 }
2589
2590 if (wps_process_uuid_e(wps, attr->uuid_e) ||
2591 wps_process_mac_addr(wps, attr->mac_addr) ||
2592 wps_process_enrollee_nonce(wps, attr->enrollee_nonce) ||
2593 wps_process_pubkey(wps, attr->public_key, attr->public_key_len) ||
2594 wps_process_auth_type_flags(wps, attr->auth_type_flags) ||
2595 wps_process_encr_type_flags(wps, attr->encr_type_flags) ||
2596 wps_process_conn_type_flags(wps, attr->conn_type_flags) ||
2597 wps_process_config_methods(wps, attr->config_methods) ||
2598 wps_process_wps_state(wps, attr->wps_state) ||
2599 wps_process_device_attrs(&wps->peer_dev, attr) ||
2600 wps_process_rf_bands(&wps->peer_dev, attr->rf_bands) ||
2601 wps_process_assoc_state(wps, attr->assoc_state) ||
2602 wps_process_dev_password_id(wps, attr->dev_password_id) ||
2603 wps_process_config_error(wps, attr->config_error) ||
2604 wps_process_os_version(&wps->peer_dev, attr->os_version))
2605 return WPS_FAILURE;
2606
2607 if (wps->dev_pw_id < 0x10 &&
2608 wps->dev_pw_id != DEV_PW_DEFAULT &&
2609 wps->dev_pw_id != DEV_PW_P2PS_DEFAULT &&
2610 wps->dev_pw_id != DEV_PW_USER_SPECIFIED &&
2611 wps->dev_pw_id != DEV_PW_MACHINE_SPECIFIED &&
2612 wps->dev_pw_id != DEV_PW_REGISTRAR_SPECIFIED &&
2613 #ifdef CONFIG_WPS_NFC
2614 wps->dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER &&
2615 #endif /* CONFIG_WPS_NFC */
2616 (wps->dev_pw_id != DEV_PW_PUSHBUTTON ||
2617 !wps->wps->registrar->pbc)) {
2618 wpa_printf(MSG_DEBUG, "WPS: Unsupported Device Password ID %d",
2619 wps->dev_pw_id);
2620 wps->state = SEND_M2D;
2621 return WPS_CONTINUE;
2622 }
2623
2624 #ifdef CONFIG_WPS_NFC
2625 if (wps->dev_pw_id >= 0x10 ||
2626 wps->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER) {
2627 struct wps_nfc_pw_token *token;
2628 const u8 *addr[1];
2629 u8 hash[WPS_HASH_LEN];
2630
2631 wpa_printf(MSG_DEBUG, "WPS: Searching for NFC token match for id=%d (ctx %p registrar %p)",
2632 wps->dev_pw_id, wps->wps, wps->wps->registrar);
2633 token = wps_get_nfc_pw_token(
2634 &wps->wps->registrar->nfc_pw_tokens, wps->dev_pw_id);
2635 if (token && token->peer_pk_hash_known) {
2636 size_t len;
2637
2638 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC "
2639 "Password Token");
2640 dl_list_del(&token->list);
2641 wps->nfc_pw_token = token;
2642
2643 addr[0] = attr->public_key;
2644 len = attr->public_key_len;
2645 sha256_vector(1, addr, &len, hash);
2646 if (os_memcmp_const(hash,
2647 wps->nfc_pw_token->pubkey_hash,
2648 WPS_OOB_PUBKEY_HASH_LEN) != 0) {
2649 wpa_printf(MSG_ERROR, "WPS: Public Key hash "
2650 "mismatch");
2651 wps->state = SEND_M2D;
2652 wps->config_error =
2653 WPS_CFG_PUBLIC_KEY_HASH_MISMATCH;
2654 return WPS_CONTINUE;
2655 }
2656 } else if (token) {
2657 wpa_printf(MSG_DEBUG, "WPS: Found matching NFC "
2658 "Password Token (no peer PK hash)");
2659 wps->nfc_pw_token = token;
2660 } else if (wps->dev_pw_id >= 0x10 &&
2661 wps->wps->ap_nfc_dev_pw_id == wps->dev_pw_id &&
2662 wps->wps->ap_nfc_dev_pw) {
2663 wpa_printf(MSG_DEBUG, "WPS: Found match with own NFC Password Token");
2664 }
2665 }
2666 #endif /* CONFIG_WPS_NFC */
2667
2668 if (wps->dev_pw_id == DEV_PW_PUSHBUTTON) {
2669 if ((wps->wps->registrar->force_pbc_overlap ||
2670 wps_registrar_pbc_overlap(wps->wps->registrar,
2671 wps->mac_addr_e, wps->uuid_e) ||
2672 !wps_registrar_p2p_dev_addr_match(wps)) &&
2673 !wps_registrar_skip_overlap(wps)) {
2674 wpa_printf(MSG_DEBUG, "WPS: PBC overlap - deny PBC "
2675 "negotiation");
2676 wps->state = SEND_M2D;
2677 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2678 wps_pbc_overlap_event(wps->wps);
2679 wps_fail_event(wps->wps, WPS_M1,
2680 WPS_CFG_MULTIPLE_PBC_DETECTED,
2681 WPS_EI_NO_ERROR, wps->mac_addr_e);
2682 wps->wps->registrar->force_pbc_overlap = 1;
2683 return WPS_CONTINUE;
2684 }
2685 wps_registrar_add_pbc_session(wps->wps->registrar,
2686 wps->mac_addr_e, wps->uuid_e);
2687 wps->pbc = 1;
2688 }
2689
2690 #ifdef WPS_WORKAROUNDS
2691 /*
2692 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in
2693 * passphrase format. To avoid interop issues, force PSK format to be
2694 * used.
2695 */
2696 if (!wps->use_psk_key &&
2697 wps->peer_dev.manufacturer &&
2698 os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 &&
2699 wps->peer_dev.model_name &&
2700 os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) {
2701 wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in "
2702 "PSK format");
2703 wps->use_psk_key = 1;
2704 }
2705 #endif /* WPS_WORKAROUNDS */
2706
2707 wps->state = SEND_M2;
2708 return WPS_CONTINUE;
2709 }
2710
2711
wps_process_m3(struct wps_data * wps,const struct wpabuf * msg,struct wps_parse_attr * attr)2712 static enum wps_process_res wps_process_m3(struct wps_data *wps,
2713 const struct wpabuf *msg,
2714 struct wps_parse_attr *attr)
2715 {
2716 wpa_printf(MSG_DEBUG, "WPS: Received M3");
2717
2718 if (wps->state != RECV_M3) {
2719 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2720 "receiving M3", wps->state);
2721 wps->state = SEND_WSC_NACK;
2722 return WPS_CONTINUE;
2723 }
2724
2725 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2726 !wps_registrar_skip_overlap(wps)) {
2727 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2728 "session overlap");
2729 wps->state = SEND_WSC_NACK;
2730 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2731 return WPS_CONTINUE;
2732 }
2733
2734 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2735 wps_process_authenticator(wps, attr->authenticator, msg) ||
2736 wps_process_e_hash1(wps, attr->e_hash1) ||
2737 wps_process_e_hash2(wps, attr->e_hash2)) {
2738 wps->state = SEND_WSC_NACK;
2739 return WPS_CONTINUE;
2740 }
2741
2742 wps->state = SEND_M4;
2743 return WPS_CONTINUE;
2744 }
2745
2746
wps_process_m5(struct wps_data * wps,const struct wpabuf * msg,struct wps_parse_attr * attr)2747 static enum wps_process_res wps_process_m5(struct wps_data *wps,
2748 const struct wpabuf *msg,
2749 struct wps_parse_attr *attr)
2750 {
2751 struct wpabuf *decrypted;
2752 struct wps_parse_attr eattr;
2753
2754 wpa_printf(MSG_DEBUG, "WPS: Received M5");
2755
2756 if (wps->state != RECV_M5) {
2757 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2758 "receiving M5", wps->state);
2759 wps->state = SEND_WSC_NACK;
2760 return WPS_CONTINUE;
2761 }
2762
2763 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2764 !wps_registrar_skip_overlap(wps)) {
2765 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2766 "session overlap");
2767 wps->state = SEND_WSC_NACK;
2768 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2769 return WPS_CONTINUE;
2770 }
2771
2772 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2773 wps_process_authenticator(wps, attr->authenticator, msg)) {
2774 wps->state = SEND_WSC_NACK;
2775 return WPS_CONTINUE;
2776 }
2777
2778 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2779 attr->encr_settings_len);
2780 if (decrypted == NULL) {
2781 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypted Encrypted "
2782 "Settings attribute");
2783 wps->state = SEND_WSC_NACK;
2784 return WPS_CONTINUE;
2785 }
2786
2787 if (wps_validate_m5_encr(decrypted, attr->version2 != NULL) < 0) {
2788 wpabuf_free(decrypted);
2789 wps->state = SEND_WSC_NACK;
2790 return WPS_CONTINUE;
2791 }
2792
2793 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2794 "attribute");
2795 if (wps_parse_msg(decrypted, &eattr) < 0 ||
2796 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2797 wps_process_e_snonce1(wps, eattr.e_snonce1)) {
2798 wpabuf_free(decrypted);
2799 wps->state = SEND_WSC_NACK;
2800 return WPS_CONTINUE;
2801 }
2802 wpabuf_free(decrypted);
2803
2804 wps->state = SEND_M6;
2805 return WPS_CONTINUE;
2806 }
2807
2808
wps_sta_cred_cb(struct wps_data * wps)2809 static void wps_sta_cred_cb(struct wps_data *wps)
2810 {
2811 /*
2812 * Update credential to only include a single authentication and
2813 * encryption type in case the AP configuration includes more than one
2814 * option.
2815 */
2816 if (wps->cred.auth_type & WPS_AUTH_WPA2PSK)
2817 wps->cred.auth_type = WPS_AUTH_WPA2PSK;
2818 else if (wps->cred.auth_type & WPS_AUTH_WPAPSK)
2819 wps->cred.auth_type = WPS_AUTH_WPAPSK;
2820 if (wps->cred.encr_type & WPS_ENCR_AES)
2821 wps->cred.encr_type = WPS_ENCR_AES;
2822 else if (wps->cred.encr_type & WPS_ENCR_TKIP)
2823 wps->cred.encr_type = WPS_ENCR_TKIP;
2824 wpa_printf(MSG_DEBUG, "WPS: Update local configuration based on the "
2825 "AP configuration");
2826 if (wps->wps->cred_cb)
2827 wps->wps->cred_cb(wps->wps->cb_ctx, &wps->cred);
2828 }
2829
2830
wps_cred_update(struct wps_credential * dst,struct wps_credential * src)2831 static void wps_cred_update(struct wps_credential *dst,
2832 struct wps_credential *src)
2833 {
2834 os_memcpy(dst->ssid, src->ssid, sizeof(dst->ssid));
2835 dst->ssid_len = src->ssid_len;
2836 dst->auth_type = src->auth_type;
2837 dst->encr_type = src->encr_type;
2838 dst->key_idx = src->key_idx;
2839 os_memcpy(dst->key, src->key, sizeof(dst->key));
2840 dst->key_len = src->key_len;
2841 }
2842
2843
wps_process_ap_settings_r(struct wps_data * wps,struct wps_parse_attr * attr)2844 static int wps_process_ap_settings_r(struct wps_data *wps,
2845 struct wps_parse_attr *attr)
2846 {
2847 struct wpabuf *msg;
2848
2849 if (wps->wps->ap || wps->er)
2850 return 0;
2851
2852 /* AP Settings Attributes in M7 when Enrollee is an AP */
2853 if (wps_process_ap_settings(attr, &wps->cred) < 0)
2854 return -1;
2855
2856 wpa_printf(MSG_INFO, "WPS: Received old AP configuration from AP");
2857
2858 if (wps->new_ap_settings) {
2859 wpa_printf(MSG_INFO, "WPS: Update AP configuration based on "
2860 "new settings");
2861 wps_cred_update(&wps->cred, wps->new_ap_settings);
2862 return 0;
2863 } else {
2864 /*
2865 * Use the AP PIN only to receive the current AP settings, not
2866 * to reconfigure the AP.
2867 */
2868
2869 /*
2870 * Clear selected registrar here since we do not get to
2871 * WSC_Done in this protocol run.
2872 */
2873 wps_registrar_pin_completed(wps->wps->registrar);
2874
2875 msg = wps_build_ap_cred(wps);
2876 if (msg == NULL)
2877 return -1;
2878 wps->cred.cred_attr = wpabuf_head(msg);
2879 wps->cred.cred_attr_len = wpabuf_len(msg);
2880
2881 if (wps->ap_settings_cb) {
2882 wps->ap_settings_cb(wps->ap_settings_cb_ctx,
2883 &wps->cred);
2884 wpabuf_free(msg);
2885 return 1;
2886 }
2887 wps_sta_cred_cb(wps);
2888
2889 wps->cred.cred_attr = NULL;
2890 wps->cred.cred_attr_len = 0;
2891 wpabuf_free(msg);
2892
2893 return 1;
2894 }
2895 }
2896
2897
wps_process_m7(struct wps_data * wps,const struct wpabuf * msg,struct wps_parse_attr * attr)2898 static enum wps_process_res wps_process_m7(struct wps_data *wps,
2899 const struct wpabuf *msg,
2900 struct wps_parse_attr *attr)
2901 {
2902 struct wpabuf *decrypted;
2903 struct wps_parse_attr eattr;
2904
2905 wpa_printf(MSG_DEBUG, "WPS: Received M7");
2906
2907 if (wps->state != RECV_M7) {
2908 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
2909 "receiving M7", wps->state);
2910 wps->state = SEND_WSC_NACK;
2911 return WPS_CONTINUE;
2912 }
2913
2914 if (wps->pbc && wps->wps->registrar->force_pbc_overlap &&
2915 !wps_registrar_skip_overlap(wps)) {
2916 wpa_printf(MSG_DEBUG, "WPS: Reject negotiation due to PBC "
2917 "session overlap");
2918 wps->state = SEND_WSC_NACK;
2919 wps->config_error = WPS_CFG_MULTIPLE_PBC_DETECTED;
2920 return WPS_CONTINUE;
2921 }
2922
2923 if (wps_process_registrar_nonce(wps, attr->registrar_nonce) ||
2924 wps_process_authenticator(wps, attr->authenticator, msg)) {
2925 wps->state = SEND_WSC_NACK;
2926 return WPS_CONTINUE;
2927 }
2928
2929 decrypted = wps_decrypt_encr_settings(wps, attr->encr_settings,
2930 attr->encr_settings_len);
2931 if (decrypted == NULL) {
2932 wpa_printf(MSG_DEBUG, "WPS: Failed to decrypt Encrypted "
2933 "Settings attribute");
2934 wps->state = SEND_WSC_NACK;
2935 return WPS_CONTINUE;
2936 }
2937
2938 if (wps_validate_m7_encr(decrypted, wps->wps->ap || wps->er,
2939 attr->version2 != NULL) < 0) {
2940 wpabuf_free(decrypted);
2941 wps->state = SEND_WSC_NACK;
2942 return WPS_CONTINUE;
2943 }
2944
2945 wpa_printf(MSG_DEBUG, "WPS: Processing decrypted Encrypted Settings "
2946 "attribute");
2947 if (wps_parse_msg(decrypted, &eattr) < 0 ||
2948 wps_process_key_wrap_auth(wps, decrypted, eattr.key_wrap_auth) ||
2949 wps_process_e_snonce2(wps, eattr.e_snonce2) ||
2950 wps_process_ap_settings_r(wps, &eattr)) {
2951 wpabuf_free(decrypted);
2952 wps->state = SEND_WSC_NACK;
2953 return WPS_CONTINUE;
2954 }
2955
2956 wpabuf_free(decrypted);
2957
2958 wps->state = SEND_M8;
2959 return WPS_CONTINUE;
2960 }
2961
2962
wps_process_wsc_msg(struct wps_data * wps,const struct wpabuf * msg)2963 static enum wps_process_res wps_process_wsc_msg(struct wps_data *wps,
2964 const struct wpabuf *msg)
2965 {
2966 struct wps_parse_attr attr;
2967 enum wps_process_res ret = WPS_CONTINUE;
2968
2969 wpa_printf(MSG_DEBUG, "WPS: Received WSC_MSG");
2970
2971 if (wps_parse_msg(msg, &attr) < 0)
2972 return WPS_FAILURE;
2973
2974 if (attr.msg_type == NULL) {
2975 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
2976 wps->state = SEND_WSC_NACK;
2977 return WPS_CONTINUE;
2978 }
2979
2980 if (*attr.msg_type != WPS_M1 &&
2981 (attr.registrar_nonce == NULL ||
2982 os_memcmp(wps->nonce_r, attr.registrar_nonce,
2983 WPS_NONCE_LEN) != 0)) {
2984 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
2985 return WPS_FAILURE;
2986 }
2987
2988 switch (*attr.msg_type) {
2989 case WPS_M1:
2990 if (wps_validate_m1(msg) < 0)
2991 return WPS_FAILURE;
2992 #ifdef CONFIG_WPS_UPNP
2993 if (wps->wps->wps_upnp && attr.mac_addr) {
2994 /* Remove old pending messages when starting new run */
2995 wps_free_pending_msgs(wps->wps->upnp_msgs);
2996 wps->wps->upnp_msgs = NULL;
2997
2998 upnp_wps_device_send_wlan_event(
2999 wps->wps->wps_upnp, attr.mac_addr,
3000 UPNP_WPS_WLANEVENT_TYPE_EAP, msg);
3001 }
3002 #endif /* CONFIG_WPS_UPNP */
3003 ret = wps_process_m1(wps, &attr);
3004 break;
3005 case WPS_M3:
3006 if (wps_validate_m3(msg) < 0)
3007 return WPS_FAILURE;
3008 ret = wps_process_m3(wps, msg, &attr);
3009 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
3010 wps_fail_event(wps->wps, WPS_M3, wps->config_error,
3011 wps->error_indication, wps->mac_addr_e);
3012 break;
3013 case WPS_M5:
3014 if (wps_validate_m5(msg) < 0)
3015 return WPS_FAILURE;
3016 ret = wps_process_m5(wps, msg, &attr);
3017 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
3018 wps_fail_event(wps->wps, WPS_M5, wps->config_error,
3019 wps->error_indication, wps->mac_addr_e);
3020 break;
3021 case WPS_M7:
3022 if (wps_validate_m7(msg) < 0)
3023 return WPS_FAILURE;
3024 ret = wps_process_m7(wps, msg, &attr);
3025 if (ret == WPS_FAILURE || wps->state == SEND_WSC_NACK)
3026 wps_fail_event(wps->wps, WPS_M7, wps->config_error,
3027 wps->error_indication, wps->mac_addr_e);
3028 break;
3029 default:
3030 wpa_printf(MSG_DEBUG, "WPS: Unsupported Message Type %d",
3031 *attr.msg_type);
3032 return WPS_FAILURE;
3033 }
3034
3035 if (ret == WPS_CONTINUE) {
3036 /* Save a copy of the last message for Authenticator derivation
3037 */
3038 wpabuf_free(wps->last_msg);
3039 wps->last_msg = wpabuf_dup(msg);
3040 }
3041
3042 return ret;
3043 }
3044
3045
wps_process_wsc_ack(struct wps_data * wps,const struct wpabuf * msg)3046 static enum wps_process_res wps_process_wsc_ack(struct wps_data *wps,
3047 const struct wpabuf *msg)
3048 {
3049 struct wps_parse_attr attr;
3050
3051 wpa_printf(MSG_DEBUG, "WPS: Received WSC_ACK");
3052
3053 if (wps_parse_msg(msg, &attr) < 0)
3054 return WPS_FAILURE;
3055
3056 if (attr.msg_type == NULL) {
3057 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3058 return WPS_FAILURE;
3059 }
3060
3061 if (*attr.msg_type != WPS_WSC_ACK) {
3062 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3063 *attr.msg_type);
3064 return WPS_FAILURE;
3065 }
3066
3067 #ifdef CONFIG_WPS_UPNP
3068 if (wps->wps->wps_upnp && wps->ext_reg && wps->state == RECV_M2D_ACK &&
3069 upnp_wps_subscribers(wps->wps->wps_upnp)) {
3070 if (wps->wps->upnp_msgs)
3071 return WPS_CONTINUE;
3072 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
3073 "external Registrar");
3074 return WPS_PENDING;
3075 }
3076 #endif /* CONFIG_WPS_UPNP */
3077
3078 if (attr.registrar_nonce == NULL ||
3079 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3080 {
3081 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3082 return WPS_FAILURE;
3083 }
3084
3085 if (attr.enrollee_nonce == NULL ||
3086 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3087 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3088 return WPS_FAILURE;
3089 }
3090
3091 if (wps->state == RECV_M2D_ACK) {
3092 #ifdef CONFIG_WPS_UPNP
3093 if (wps->wps->wps_upnp &&
3094 upnp_wps_subscribers(wps->wps->wps_upnp)) {
3095 if (wps->wps->upnp_msgs)
3096 return WPS_CONTINUE;
3097 if (wps->ext_reg == 0)
3098 wps->ext_reg = 1;
3099 wpa_printf(MSG_DEBUG, "WPS: Wait for response from an "
3100 "external Registrar");
3101 return WPS_PENDING;
3102 }
3103 #endif /* CONFIG_WPS_UPNP */
3104
3105 wpa_printf(MSG_DEBUG, "WPS: No more registrars available - "
3106 "terminate negotiation");
3107 }
3108
3109 return WPS_FAILURE;
3110 }
3111
3112
wps_process_wsc_nack(struct wps_data * wps,const struct wpabuf * msg)3113 static enum wps_process_res wps_process_wsc_nack(struct wps_data *wps,
3114 const struct wpabuf *msg)
3115 {
3116 struct wps_parse_attr attr;
3117 int old_state;
3118 u16 config_error;
3119
3120 wpa_printf(MSG_DEBUG, "WPS: Received WSC_NACK");
3121
3122 old_state = wps->state;
3123 wps->state = SEND_WSC_NACK;
3124
3125 if (wps_parse_msg(msg, &attr) < 0)
3126 return WPS_FAILURE;
3127
3128 if (attr.msg_type == NULL) {
3129 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3130 return WPS_FAILURE;
3131 }
3132
3133 if (*attr.msg_type != WPS_WSC_NACK) {
3134 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3135 *attr.msg_type);
3136 return WPS_FAILURE;
3137 }
3138
3139 #ifdef CONFIG_WPS_UPNP
3140 if (wps->wps->wps_upnp && wps->ext_reg) {
3141 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3142 "Registrar terminated by the Enrollee");
3143 return WPS_FAILURE;
3144 }
3145 #endif /* CONFIG_WPS_UPNP */
3146
3147 if (attr.registrar_nonce == NULL ||
3148 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3149 {
3150 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3151 return WPS_FAILURE;
3152 }
3153
3154 if (attr.enrollee_nonce == NULL ||
3155 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3156 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3157 return WPS_FAILURE;
3158 }
3159
3160 if (attr.config_error == NULL) {
3161 wpa_printf(MSG_DEBUG, "WPS: No Configuration Error attribute "
3162 "in WSC_NACK");
3163 return WPS_FAILURE;
3164 }
3165
3166 config_error = WPA_GET_BE16(attr.config_error);
3167 wpa_printf(MSG_DEBUG, "WPS: Enrollee terminated negotiation with "
3168 "Configuration Error %d", config_error);
3169
3170 switch (old_state) {
3171 case RECV_M3:
3172 wps_fail_event(wps->wps, WPS_M2, config_error,
3173 wps->error_indication, wps->mac_addr_e);
3174 break;
3175 case RECV_M5:
3176 wps_fail_event(wps->wps, WPS_M4, config_error,
3177 wps->error_indication, wps->mac_addr_e);
3178 break;
3179 case RECV_M7:
3180 wps_fail_event(wps->wps, WPS_M6, config_error,
3181 wps->error_indication, wps->mac_addr_e);
3182 break;
3183 case RECV_DONE:
3184 wps_fail_event(wps->wps, WPS_M8, config_error,
3185 wps->error_indication, wps->mac_addr_e);
3186 break;
3187 default:
3188 break;
3189 }
3190
3191 return WPS_FAILURE;
3192 }
3193
3194
wps_process_wsc_done(struct wps_data * wps,const struct wpabuf * msg)3195 static enum wps_process_res wps_process_wsc_done(struct wps_data *wps,
3196 const struct wpabuf *msg)
3197 {
3198 struct wps_parse_attr attr;
3199
3200 wpa_printf(MSG_DEBUG, "WPS: Received WSC_Done");
3201
3202 if (wps->state != RECV_DONE &&
3203 (!wps->wps->wps_upnp || !wps->ext_reg)) {
3204 wpa_printf(MSG_DEBUG, "WPS: Unexpected state (%d) for "
3205 "receiving WSC_Done", wps->state);
3206 return WPS_FAILURE;
3207 }
3208
3209 if (wps_parse_msg(msg, &attr) < 0)
3210 return WPS_FAILURE;
3211
3212 if (attr.msg_type == NULL) {
3213 wpa_printf(MSG_DEBUG, "WPS: No Message Type attribute");
3214 return WPS_FAILURE;
3215 }
3216
3217 if (*attr.msg_type != WPS_WSC_DONE) {
3218 wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type %d",
3219 *attr.msg_type);
3220 return WPS_FAILURE;
3221 }
3222
3223 #ifdef CONFIG_WPS_UPNP
3224 if (wps->wps->wps_upnp && wps->ext_reg) {
3225 wpa_printf(MSG_DEBUG, "WPS: Negotiation using external "
3226 "Registrar completed successfully");
3227 wps_device_store(wps->wps->registrar, &wps->peer_dev,
3228 wps->uuid_e);
3229 return WPS_DONE;
3230 }
3231 #endif /* CONFIG_WPS_UPNP */
3232
3233 if (attr.registrar_nonce == NULL ||
3234 os_memcmp(wps->nonce_r, attr.registrar_nonce, WPS_NONCE_LEN) != 0)
3235 {
3236 wpa_printf(MSG_DEBUG, "WPS: Mismatch in registrar nonce");
3237 return WPS_FAILURE;
3238 }
3239
3240 if (attr.enrollee_nonce == NULL ||
3241 os_memcmp(wps->nonce_e, attr.enrollee_nonce, WPS_NONCE_LEN) != 0) {
3242 wpa_printf(MSG_DEBUG, "WPS: Mismatch in enrollee nonce");
3243 return WPS_FAILURE;
3244 }
3245
3246 wpa_printf(MSG_DEBUG, "WPS: Negotiation completed successfully");
3247 wps_device_store(wps->wps->registrar, &wps->peer_dev,
3248 wps->uuid_e);
3249
3250 if (wps->wps->wps_state == WPS_STATE_NOT_CONFIGURED && wps->new_psk &&
3251 wps->wps->ap && !wps->wps->registrar->disable_auto_conf) {
3252 struct wps_credential cred;
3253
3254 wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
3255 "on first Enrollee connection");
3256
3257 os_memset(&cred, 0, sizeof(cred));
3258 os_memcpy(cred.ssid, wps->wps->ssid, wps->wps->ssid_len);
3259 cred.ssid_len = wps->wps->ssid_len;
3260 if (wps->wps->rf_band_cb(wps->wps->cb_ctx) == WPS_RF_60GHZ) {
3261 cred.auth_type = WPS_AUTH_WPA2PSK;
3262 cred.encr_type = WPS_ENCR_AES;
3263 } else {
3264 cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
3265 cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
3266 }
3267 os_memcpy(cred.key, wps->new_psk, wps->new_psk_len);
3268 cred.key_len = wps->new_psk_len;
3269
3270 wps->wps->wps_state = WPS_STATE_CONFIGURED;
3271 wpa_hexdump_ascii_key(MSG_DEBUG,
3272 "WPS: Generated random passphrase",
3273 wps->new_psk, wps->new_psk_len);
3274 if (wps->wps->cred_cb)
3275 wps->wps->cred_cb(wps->wps->cb_ctx, &cred);
3276
3277 os_free(wps->new_psk);
3278 wps->new_psk = NULL;
3279 }
3280
3281 if (!wps->wps->ap && !wps->er)
3282 wps_sta_cred_cb(wps);
3283
3284 if (wps->new_psk) {
3285 if (wps_cb_new_psk(wps->wps->registrar, wps->mac_addr_e,
3286 wps->p2p_dev_addr, wps->new_psk,
3287 wps->new_psk_len)) {
3288 wpa_printf(MSG_DEBUG, "WPS: Failed to configure the "
3289 "new PSK");
3290 }
3291 os_free(wps->new_psk);
3292 wps->new_psk = NULL;
3293 }
3294
3295 wps_cb_reg_success(wps->wps->registrar, wps->mac_addr_e, wps->uuid_e,
3296 wps->dev_password, wps->dev_password_len);
3297
3298 if (wps->pbc) {
3299 wps_registrar_remove_pbc_session(wps->wps->registrar,
3300 wps->uuid_e,
3301 wps->p2p_dev_addr);
3302 wps_registrar_pbc_completed(wps->wps->registrar);
3303 #ifdef WPS_WORKAROUNDS
3304 os_get_reltime(&wps->wps->registrar->pbc_ignore_start);
3305 #endif /* WPS_WORKAROUNDS */
3306 os_memcpy(wps->wps->registrar->pbc_ignore_uuid, wps->uuid_e,
3307 WPS_UUID_LEN);
3308 } else {
3309 wps_registrar_pin_completed(wps->wps->registrar);
3310 }
3311 /* TODO: maintain AuthorizedMACs somewhere separately for each ER and
3312 * merge them into APs own list.. */
3313
3314 wps_success_event(wps->wps, wps->mac_addr_e);
3315
3316 return WPS_DONE;
3317 }
3318
3319
wps_registrar_process_msg(struct wps_data * wps,enum wsc_op_code op_code,const struct wpabuf * msg)3320 enum wps_process_res wps_registrar_process_msg(struct wps_data *wps,
3321 enum wsc_op_code op_code,
3322 const struct wpabuf *msg)
3323 {
3324 enum wps_process_res ret;
3325
3326 wpa_printf(MSG_DEBUG, "WPS: Processing received message (len=%lu "
3327 "op_code=%d)",
3328 (unsigned long) wpabuf_len(msg), op_code);
3329
3330 #ifdef CONFIG_WPS_UPNP
3331 if (wps->wps->wps_upnp && op_code == WSC_MSG && wps->ext_reg == 1) {
3332 struct wps_parse_attr attr;
3333 if (wps_parse_msg(msg, &attr) == 0 && attr.msg_type &&
3334 *attr.msg_type == WPS_M3)
3335 wps->ext_reg = 2; /* past M2/M2D phase */
3336 }
3337 if (wps->ext_reg > 1)
3338 wps_registrar_free_pending_m2(wps->wps);
3339 if (wps->wps->wps_upnp && wps->ext_reg &&
3340 wps->wps->upnp_msgs == NULL &&
3341 (op_code == WSC_MSG || op_code == WSC_Done || op_code == WSC_NACK))
3342 {
3343 struct wps_parse_attr attr;
3344 int type;
3345 if (wps_parse_msg(msg, &attr) < 0 || attr.msg_type == NULL)
3346 type = -1;
3347 else
3348 type = *attr.msg_type;
3349 wpa_printf(MSG_DEBUG, "WPS: Sending received message (type %d)"
3350 " to external Registrar for processing", type);
3351 upnp_wps_device_send_wlan_event(wps->wps->wps_upnp,
3352 wps->mac_addr_e,
3353 UPNP_WPS_WLANEVENT_TYPE_EAP,
3354 msg);
3355 if (op_code == WSC_MSG)
3356 return WPS_PENDING;
3357 } else if (wps->wps->wps_upnp && wps->ext_reg && op_code == WSC_MSG) {
3358 wpa_printf(MSG_DEBUG, "WPS: Skip internal processing - using "
3359 "external Registrar");
3360 return WPS_CONTINUE;
3361 }
3362 #endif /* CONFIG_WPS_UPNP */
3363
3364 switch (op_code) {
3365 case WSC_MSG:
3366 return wps_process_wsc_msg(wps, msg);
3367 case WSC_ACK:
3368 if (wps_validate_wsc_ack(msg) < 0)
3369 return WPS_FAILURE;
3370 return wps_process_wsc_ack(wps, msg);
3371 case WSC_NACK:
3372 if (wps_validate_wsc_nack(msg) < 0)
3373 return WPS_FAILURE;
3374 return wps_process_wsc_nack(wps, msg);
3375 case WSC_Done:
3376 if (wps_validate_wsc_done(msg) < 0)
3377 return WPS_FAILURE;
3378 ret = wps_process_wsc_done(wps, msg);
3379 if (ret == WPS_FAILURE) {
3380 wps->state = SEND_WSC_NACK;
3381 wps_fail_event(wps->wps, WPS_WSC_DONE,
3382 wps->config_error,
3383 wps->error_indication, wps->mac_addr_e);
3384 }
3385 return ret;
3386 default:
3387 wpa_printf(MSG_DEBUG, "WPS: Unsupported op_code %d", op_code);
3388 return WPS_FAILURE;
3389 }
3390 }
3391
3392
wps_registrar_update_ie(struct wps_registrar * reg)3393 int wps_registrar_update_ie(struct wps_registrar *reg)
3394 {
3395 return wps_set_ie(reg);
3396 }
3397
3398
wps_registrar_set_selected_timeout(void * eloop_ctx,void * timeout_ctx)3399 static void wps_registrar_set_selected_timeout(void *eloop_ctx,
3400 void *timeout_ctx)
3401 {
3402 struct wps_registrar *reg = eloop_ctx;
3403
3404 wpa_printf(MSG_DEBUG, "WPS: Selected Registrar timeout - "
3405 "unselect internal Registrar");
3406 reg->selected_registrar = 0;
3407 reg->pbc = 0;
3408 wps_registrar_selected_registrar_changed(reg, 0);
3409 }
3410
3411
3412 #ifdef CONFIG_WPS_UPNP
wps_registrar_sel_reg_add(struct wps_registrar * reg,struct subscription * s)3413 static void wps_registrar_sel_reg_add(struct wps_registrar *reg,
3414 struct subscription *s)
3415 {
3416 int i, j;
3417 wpa_printf(MSG_DEBUG, "WPS: External Registrar selected (dev_pw_id=%d "
3418 "config_methods=0x%x)",
3419 s->dev_password_id, s->config_methods);
3420 reg->sel_reg_union = 1;
3421 if (reg->sel_reg_dev_password_id_override != DEV_PW_PUSHBUTTON)
3422 reg->sel_reg_dev_password_id_override = s->dev_password_id;
3423 if (reg->sel_reg_config_methods_override == -1)
3424 reg->sel_reg_config_methods_override = 0;
3425 reg->sel_reg_config_methods_override |= s->config_methods;
3426 for (i = 0; i < WPS_MAX_AUTHORIZED_MACS; i++)
3427 if (is_zero_ether_addr(reg->authorized_macs_union[i]))
3428 break;
3429 for (j = 0; i < WPS_MAX_AUTHORIZED_MACS && j < WPS_MAX_AUTHORIZED_MACS;
3430 j++) {
3431 if (is_zero_ether_addr(s->authorized_macs[j]))
3432 break;
3433 wpa_printf(MSG_DEBUG, "WPS: Add authorized MAC into union: "
3434 MACSTR, MAC2STR(s->authorized_macs[j]));
3435 os_memcpy(reg->authorized_macs_union[i],
3436 s->authorized_macs[j], ETH_ALEN);
3437 i++;
3438 }
3439 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union",
3440 (u8 *) reg->authorized_macs_union,
3441 sizeof(reg->authorized_macs_union));
3442 }
3443 #endif /* CONFIG_WPS_UPNP */
3444
3445
wps_registrar_sel_reg_union(struct wps_registrar * reg)3446 static void wps_registrar_sel_reg_union(struct wps_registrar *reg)
3447 {
3448 #ifdef CONFIG_WPS_UPNP
3449 struct subscription *s;
3450
3451 if (reg->wps->wps_upnp == NULL)
3452 return;
3453
3454 dl_list_for_each(s, ®->wps->wps_upnp->subscriptions,
3455 struct subscription, list) {
3456 struct subscr_addr *sa;
3457 sa = dl_list_first(&s->addr_list, struct subscr_addr, list);
3458 if (sa) {
3459 wpa_printf(MSG_DEBUG, "WPS: External Registrar %s:%d",
3460 inet_ntoa(sa->saddr.sin_addr),
3461 ntohs(sa->saddr.sin_port));
3462 }
3463 if (s->selected_registrar)
3464 wps_registrar_sel_reg_add(reg, s);
3465 else
3466 wpa_printf(MSG_DEBUG, "WPS: External Registrar not "
3467 "selected");
3468 }
3469 #endif /* CONFIG_WPS_UPNP */
3470 }
3471
3472
3473 /**
3474 * wps_registrar_selected_registrar_changed - SetSelectedRegistrar change
3475 * @reg: Registrar data from wps_registrar_init()
3476 *
3477 * This function is called when selected registrar state changes, e.g., when an
3478 * AP receives a SetSelectedRegistrar UPnP message.
3479 */
wps_registrar_selected_registrar_changed(struct wps_registrar * reg,u16 dev_pw_id)3480 void wps_registrar_selected_registrar_changed(struct wps_registrar *reg,
3481 u16 dev_pw_id)
3482 {
3483 wpa_printf(MSG_DEBUG, "WPS: Selected registrar information changed");
3484
3485 reg->sel_reg_union = reg->selected_registrar;
3486 reg->sel_reg_dev_password_id_override = -1;
3487 reg->sel_reg_config_methods_override = -1;
3488 os_memcpy(reg->authorized_macs_union, reg->authorized_macs,
3489 WPS_MAX_AUTHORIZED_MACS * ETH_ALEN);
3490 wpa_hexdump(MSG_DEBUG, "WPS: Authorized MACs union (start with own)",
3491 (u8 *) reg->authorized_macs_union,
3492 sizeof(reg->authorized_macs_union));
3493 if (reg->selected_registrar) {
3494 u16 methods;
3495
3496 methods = reg->wps->config_methods & ~WPS_CONFIG_PUSHBUTTON;
3497 methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
3498 WPS_CONFIG_PHY_PUSHBUTTON);
3499 if (reg->pbc) {
3500 reg->sel_reg_dev_password_id_override =
3501 DEV_PW_PUSHBUTTON;
3502 wps_set_pushbutton(&methods, reg->wps->config_methods);
3503 } else if (dev_pw_id)
3504 reg->sel_reg_dev_password_id_override = dev_pw_id;
3505 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar selected "
3506 "(pbc=%d)", reg->pbc);
3507 reg->sel_reg_config_methods_override = methods;
3508 } else
3509 wpa_printf(MSG_DEBUG, "WPS: Internal Registrar not selected");
3510
3511 wps_registrar_sel_reg_union(reg);
3512
3513 wps_set_ie(reg);
3514 wps_cb_set_sel_reg(reg);
3515 }
3516
3517
wps_registrar_get_info(struct wps_registrar * reg,const u8 * addr,char * buf,size_t buflen)3518 int wps_registrar_get_info(struct wps_registrar *reg, const u8 *addr,
3519 char *buf, size_t buflen)
3520 {
3521 struct wps_registrar_device *d;
3522 int len = 0, ret;
3523 char uuid[40];
3524 char devtype[WPS_DEV_TYPE_BUFSIZE];
3525
3526 d = wps_device_get(reg, addr);
3527 if (d == NULL)
3528 return 0;
3529 if (uuid_bin2str(d->uuid, uuid, sizeof(uuid)))
3530 return 0;
3531
3532 ret = os_snprintf(buf + len, buflen - len,
3533 "wpsUuid=%s\n"
3534 "wpsPrimaryDeviceType=%s\n"
3535 "wpsDeviceName=%s\n"
3536 "wpsManufacturer=%s\n"
3537 "wpsModelName=%s\n"
3538 "wpsModelNumber=%s\n"
3539 "wpsSerialNumber=%s\n",
3540 uuid,
3541 wps_dev_type_bin2str(d->dev.pri_dev_type, devtype,
3542 sizeof(devtype)),
3543 d->dev.device_name ? d->dev.device_name : "",
3544 d->dev.manufacturer ? d->dev.manufacturer : "",
3545 d->dev.model_name ? d->dev.model_name : "",
3546 d->dev.model_number ? d->dev.model_number : "",
3547 d->dev.serial_number ? d->dev.serial_number : "");
3548 if (os_snprintf_error(buflen - len, ret))
3549 return len;
3550 len += ret;
3551
3552 return len;
3553 }
3554
3555
wps_registrar_config_ap(struct wps_registrar * reg,struct wps_credential * cred)3556 int wps_registrar_config_ap(struct wps_registrar *reg,
3557 struct wps_credential *cred)
3558 {
3559 wpa_printf(MSG_DEBUG, "WPS: encr_type=0x%x", cred->encr_type);
3560 if (!(cred->encr_type & (WPS_ENCR_NONE | WPS_ENCR_TKIP |
3561 WPS_ENCR_AES))) {
3562 if (cred->encr_type & WPS_ENCR_WEP) {
3563 wpa_printf(MSG_INFO, "WPS: Reject new AP settings "
3564 "due to WEP configuration");
3565 return -1;
3566 }
3567
3568 wpa_printf(MSG_INFO, "WPS: Reject new AP settings due to "
3569 "invalid encr_type 0x%x", cred->encr_type);
3570 return -1;
3571 }
3572
3573 if ((cred->encr_type & (WPS_ENCR_TKIP | WPS_ENCR_AES)) ==
3574 WPS_ENCR_TKIP) {
3575 wpa_printf(MSG_DEBUG, "WPS: Upgrade encr_type TKIP -> "
3576 "TKIP+AES");
3577 cred->encr_type |= WPS_ENCR_AES;
3578 }
3579
3580 if ((cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK)) ==
3581 WPS_AUTH_WPAPSK) {
3582 wpa_printf(MSG_DEBUG, "WPS: Upgrade auth_type WPAPSK -> "
3583 "WPAPSK+WPA2PSK");
3584 cred->auth_type |= WPS_AUTH_WPA2PSK;
3585 }
3586
3587 if (reg->wps->cred_cb)
3588 return reg->wps->cred_cb(reg->wps->cb_ctx, cred);
3589
3590 return -1;
3591 }
3592
3593
3594 #ifdef CONFIG_WPS_NFC
3595
wps_registrar_add_nfc_pw_token(struct wps_registrar * reg,const u8 * pubkey_hash,u16 pw_id,const u8 * dev_pw,size_t dev_pw_len,int pk_hash_provided_oob)3596 int wps_registrar_add_nfc_pw_token(struct wps_registrar *reg,
3597 const u8 *pubkey_hash, u16 pw_id,
3598 const u8 *dev_pw, size_t dev_pw_len,
3599 int pk_hash_provided_oob)
3600 {
3601 struct wps_nfc_pw_token *token;
3602
3603 if (dev_pw_len > WPS_OOB_DEVICE_PASSWORD_LEN)
3604 return -1;
3605
3606 if (pw_id == DEV_PW_NFC_CONNECTION_HANDOVER &&
3607 (pubkey_hash == NULL || !pk_hash_provided_oob)) {
3608 wpa_printf(MSG_DEBUG, "WPS: Unexpected NFC Password Token "
3609 "addition - missing public key hash");
3610 return -1;
3611 }
3612
3613 wps_free_nfc_pw_tokens(®->nfc_pw_tokens, pw_id);
3614
3615 token = os_zalloc(sizeof(*token));
3616 if (token == NULL)
3617 return -1;
3618
3619 token->peer_pk_hash_known = pubkey_hash != NULL;
3620 if (pubkey_hash)
3621 os_memcpy(token->pubkey_hash, pubkey_hash,
3622 WPS_OOB_PUBKEY_HASH_LEN);
3623 token->pw_id = pw_id;
3624 token->pk_hash_provided_oob = pk_hash_provided_oob;
3625 if (dev_pw) {
3626 wpa_snprintf_hex_uppercase((char *) token->dev_pw,
3627 sizeof(token->dev_pw),
3628 dev_pw, dev_pw_len);
3629 token->dev_pw_len = dev_pw_len * 2;
3630 }
3631
3632 dl_list_add(®->nfc_pw_tokens, &token->list);
3633
3634 reg->selected_registrar = 1;
3635 reg->pbc = 0;
3636 wps_registrar_add_authorized_mac(reg,
3637 (u8 *) "\xff\xff\xff\xff\xff\xff");
3638 wps_registrar_selected_registrar_changed(reg, pw_id);
3639 eloop_cancel_timeout(wps_registrar_set_selected_timeout, reg, NULL);
3640 eloop_register_timeout(WPS_PBC_WALK_TIME, 0,
3641 wps_registrar_set_selected_timeout,
3642 reg, NULL);
3643
3644 wpa_printf(MSG_DEBUG, "WPS: Added NFC Device Password %u to Registrar",
3645 pw_id);
3646
3647 return 0;
3648 }
3649
3650
wps_registrar_add_nfc_password_token(struct wps_registrar * reg,const u8 * oob_dev_pw,size_t oob_dev_pw_len)3651 int wps_registrar_add_nfc_password_token(struct wps_registrar *reg,
3652 const u8 *oob_dev_pw,
3653 size_t oob_dev_pw_len)
3654 {
3655 const u8 *pos, *hash, *dev_pw;
3656 u16 id;
3657 size_t dev_pw_len;
3658
3659 if (oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2 ||
3660 oob_dev_pw_len > WPS_OOB_PUBKEY_HASH_LEN + 2 +
3661 WPS_OOB_DEVICE_PASSWORD_LEN)
3662 return -1;
3663
3664 hash = oob_dev_pw;
3665 pos = oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN;
3666 id = WPA_GET_BE16(pos);
3667 dev_pw = pos + 2;
3668 dev_pw_len = oob_dev_pw + oob_dev_pw_len - dev_pw;
3669
3670 wpa_printf(MSG_DEBUG, "WPS: Add NFC Password Token for Password ID %u",
3671 id);
3672
3673 wpa_hexdump(MSG_DEBUG, "WPS: Public Key Hash",
3674 hash, WPS_OOB_PUBKEY_HASH_LEN);
3675 wpa_hexdump_key(MSG_DEBUG, "WPS: Device Password", dev_pw, dev_pw_len);
3676
3677 return wps_registrar_add_nfc_pw_token(reg, hash, id, dev_pw,
3678 dev_pw_len, 0);
3679 }
3680
3681
wps_registrar_remove_nfc_pw_token(struct wps_registrar * reg,struct wps_nfc_pw_token * token)3682 void wps_registrar_remove_nfc_pw_token(struct wps_registrar *reg,
3683 struct wps_nfc_pw_token *token)
3684 {
3685 wps_registrar_remove_authorized_mac(reg,
3686 (u8 *) "\xff\xff\xff\xff\xff\xff");
3687 wps_registrar_selected_registrar_changed(reg, 0);
3688
3689 /*
3690 * Free the NFC password token if it was used only for a single protocol
3691 * run. The static handover case uses the same password token multiple
3692 * times, so do not free that case here.
3693 */
3694 if (token->peer_pk_hash_known)
3695 os_free(token);
3696 }
3697
3698 #endif /* CONFIG_WPS_NFC */
3699